WO2010098070A1 - Heat pump system - Google Patents

Heat pump system Download PDF

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Publication number
WO2010098070A1
WO2010098070A1 PCT/JP2010/001181 JP2010001181W WO2010098070A1 WO 2010098070 A1 WO2010098070 A1 WO 2010098070A1 JP 2010001181 W JP2010001181 W JP 2010001181W WO 2010098070 A1 WO2010098070 A1 WO 2010098070A1
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WO
WIPO (PCT)
Prior art keywords
usage
heat
heat source
refrigerant
source side
Prior art date
Application number
PCT/JP2010/001181
Other languages
French (fr)
Japanese (ja)
Inventor
本田雅裕
Original Assignee
ダイキン工業株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ダイキン工業株式会社 filed Critical ダイキン工業株式会社
Priority to CN2010800095942A priority Critical patent/CN102326038B/en
Priority to AU2010219253A priority patent/AU2010219253B2/en
Priority to EP10745957.0A priority patent/EP2402685B1/en
Priority to US13/202,628 priority patent/US8650897B2/en
Priority to KR1020117022100A priority patent/KR101372594B1/en
Publication of WO2010098070A1 publication Critical patent/WO2010098070A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B13/00—Compression machines, plants or systems, with reversible cycle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D3/00—Hot-water central heating systems
    • F24D3/08—Hot-water central heating systems in combination with systems for domestic hot-water supply
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D3/00—Hot-water central heating systems
    • F24D3/18—Hot-water central heating systems using heat pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H6/00—Combined water and air heaters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B29/00—Combined heating and refrigeration systems, e.g. operating alternately or simultaneously
    • F25B29/003—Combined heating and refrigeration systems, e.g. operating alternately or simultaneously of the compression type system
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B7/00—Compression machines, plants or systems, with cascade operation, i.e. with two or more circuits, the heat from the condenser of one circuit being absorbed by the evaporator of the next circuit
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D2200/00—Heat sources or energy sources
    • F24D2200/12—Heat pump
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/003—Indoor unit with water as a heat sink or heat source
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/006—Compression machines, plants or systems with reversible cycle not otherwise provided for two pipes connecting the outdoor side to the indoor side with multiple indoor units
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/007—Compression machines, plants or systems with reversible cycle not otherwise provided for three pipes connecting the outdoor side to the indoor side with multiple indoor units
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/023—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple indoor units
    • F25B2313/0231—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple indoor units with simultaneous cooling and heating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/027—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means
    • F25B2313/02741—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means using one four-way valve
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/12—Hot water central heating systems using heat pumps

Definitions

  • the present invention relates to a heat pump system, and more particularly, to a heat pump system in which a utilization unit for performing a hot water supply operation for heating an aqueous medium and a utilization unit for cooling and heating an air medium are connected to a common heat source unit.
  • a heat pump type hot water floor heating apparatus having a hot water heat exchanger to which a floor heating panel is connected and an indoor heat exchanger for performing room heating, as disclosed in Patent Document 1 (Japanese Patent Laid-Open No. 2000-46417).
  • Such a heat pump type hot water floor heating apparatus is mainly configured by connecting a hot water heat exchanger and an indoor heat exchanger to a compressor, a four-way valve, an outdoor heat exchanger and the like common to both. .
  • the conventional heat pump type hot water floor heating device is used for indoor air conditioning by an indoor heat exchanger, and is also used for hot water supply by connecting a hot water storage unit to the hot water heat exchanger together with or instead of the floor heating panel. It is possible.
  • an indoor air conditioning controller and hot water controller are provided, Provide one controller with a function to operate the four-way valve, or provide a centralized controller to operate the four-way valve, and switch the four-way valve when switching between indoor cooling, indoor heating, or hot water supply. It is necessary to perform the operation.
  • An object of the present invention is suitable for a desired operation in a heat pump system in which a use unit for performing a hot water supply operation for heating an aqueous medium and a use unit for cooling and heating an air medium are connected to a common heat source unit. The purpose is to switch the temperature control mode.
  • the heat pump system includes a heat source unit, and a first usage unit and a second usage unit connected to the heat source unit.
  • the heat source unit includes a compressor that compresses the refrigerant, a heat source side heat exchanger, a heat radiation operation state in which the heat source side heat exchanger functions as a refrigerant radiator, and an evaporation in which the heat source side heat exchanger functions as a refrigerant evaporator.
  • a heat source side switching mechanism capable of switching between operating states.
  • the first usage unit has a first usage-side heat exchanger in which the heat source side switching mechanism functions as a refrigerant radiator in the evaporation operation state, and the aqueous medium is removed by the heat radiation of the refrigerant in the first usage-side heat exchanger. It is possible to perform a hot water supply operation for heating.
  • the second usage unit includes a second usage-side heat exchanger in which the heat source side switching mechanism functions as a refrigerant evaporator in the heat dissipation operation state, and the heat source side switching mechanism functions as a refrigerant radiator in the evaporation operation state.
  • the first usage unit and the second usage unit cannot be operated by individually selecting a hot water supply operation, a cooling operation, or a heating operation, and the first usage side that gives a command to the first usage unit Of the heat source side switching mechanism as the temperature control mode commanded by the controller, the second usage side controller that commands the second usage unit, or the centralized controller different from the first usage side controller and the second usage side controller It is possible to operate by switching to a temperature control mode different from the switching state.
  • the first usage side controller that commands the first usage unit the second usage side controller that commands the second usage unit, or the first usage side controller and the second usage side controller are different.
  • the temperature control mode is switched to the evaporation operation state, and then the operation of the first usage unit is performed by the command of the first usage side controller, and only the cooling operation is performed.
  • the temperature control mode is switched to the heat radiation operation state, and then the operation of the second usage unit is performed according to the command of the second usage side controller.
  • the temperature control mode is evaporated.
  • the operation of the second usage unit is performed according to the command of the second usage side controller, and heating is performed together with the hot water supply operation.
  • the temperature control mode is switched to the evaporation operation state, and then the first usage unit is operated according to the command from the first usage side controller, and the second usage unit is controlled according to the command from the second usage side controller. Is operated. Then, the hot water supply operation and the heating operation cannot be performed while the temperature control mode is switched to the heat radiation operation state, and the cooling operation cannot be performed while the temperature control mode is switched to the evaporation operation state.
  • a hot water supply operation command from the first usage side controller to the first usage unit or from the second usage side controller to the second usage unit. It is necessary to switch the temperature control mode, which is a switching state of the heat source side switching mechanism that determines the operation state in the heat source unit common to the first and second usage units, as well as a command for cooling operation or heating operation to In that sense, in the heat pump system, the first usage unit and the second usage unit cannot be operated by individually selecting a hot water supply operation, a cooling operation, or a heating operation.
  • the first usage side controller that commands the first usage unit the second usage side controller that commands the second usage unit, or the first usage side controller and the second usage side controller It is possible to operate by switching to a temperature control mode different from the switching state of the heat source side switching mechanism as the temperature control mode commanded by another centralized controller.
  • the user when the hot water supply operation is performed in a state where the temperature control mode is switched to the heat dissipation operation state, the user can adjust the temperature control such that the temperature control mode is switched to the evaporation operation state. Switching to a temperature control mode suitable for a desired operation can be performed without performing an operation (command) for switching the mode.
  • the hot water supply operation is commanded from the first usage side controller to the first usage unit when the temperature control mode is in the heat dissipation operation state. If this happens, the temperature control mode is switched to the evaporation operation state, and the priority hot water supply operation, which is the operation of performing the hot water supply operation of the first usage unit, is performed.
  • the temperature control mode when the temperature control mode is in the heat dissipation operation state, when the hot water supply operation is instructed from the first usage side controller to the first usage unit, the temperature control mode is changed from the heat dissipation operation state to the evaporation operation.
  • the hot water supply operation of the first usage unit can be performed by switching to the state, the user can perform an operation (command) for switching the temperature control mode to the evaporation operation state even in an operation condition that requires a cooling operation such as summer.
  • a hot water supply operation can be performed as necessary without performing the operation.
  • the heat pump system according to the second aspect prohibits the cooling operation of the second usage unit during the priority hot water supply operation.
  • the second usage unit is switched to the heating operation state, and the second hot water supply operation is started until the priority hot water supply operation is started.
  • the usage unit is performing the cooling operation
  • the second usage unit is in a state of performing the heating operation, and during the priority hot water supply operation, the second usage unit is instructed to perform the cooling operation.
  • the heating operation is started, which is not preferable because the indoor comfort is impaired. Therefore, in this heat pump system, the cooling operation of the second usage unit is prohibited when the priority hot water supply operation is performed. Thereby, in this heat pump system, when performing priority hot water supply operation, it can prevent that indoor comfort is impaired.
  • a heat pump system is the heat pump system according to the third aspect, wherein the second usage unit further includes a usage-side fan that supplies an air medium to the second usage-side heat exchanger,
  • the usage-side fan is operated with the cooling operation stopped during the priority hot water supply operation.
  • the cooling operation of the second usage unit is prohibited in the priority hot water supply operation.
  • the operation of the usage-side fan is performed for the second usage unit for which the cooling operation is commanded from the second usage-side controller. If the operation stops, the user may misunderstand that the second usage unit has failed.
  • the usage-side fan is operated with the cooling operation stopped during the priority hot water supply operation.
  • the heat pump system according to the fifth aspect is the heat pump system according to the fourth aspect, wherein the second usage-side controller is in the cooling operation even when the cooling operation of the second usage unit in the priority hot water supply operation is stopped. Keep the display.
  • the second usage-side controller is in the cooling operation even when the cooling operation of the second usage unit in the priority hot water supply operation is stopped. Keep the display.
  • the display of the operation state of the second usage unit in the second usage side controller is changed in conjunction with stopping the cooling operation of the second usage unit, the user There is a risk of misunderstanding that the second usage unit has failed.
  • the temperature control mode is switched based on at least one of the commanded temperature control mode and the outside air temperature. Is called. In this heat pump system, switching of the temperature control mode is performed based on at least one of the commanded temperature control mode and the outside air temperature, so that the temperature control mode can be switched appropriately.
  • a heat pump system is the heat pump system according to any of the first to sixth aspects, wherein the first usage unit includes the second usage-side heat exchanger when the heat source side switching mechanism is in the heat radiation operation state. While functioning as a refrigerant evaporator, the first use side heat exchanger is connected to the heat source unit so that it can function as a refrigerant radiator. In this heat pump system, even if the temperature control mode is in the heat radiation operation state, the second usage side heat exchanger functions as a refrigerant evaporator and the first usage side heat exchanger functions as a refrigerant radiator.
  • the temperature control mode is switched to the heat radiation operation state, and then the first usage side
  • the first usage unit is operated by a command from the controller and the second usage unit is operated by a command from the second usage side controller.
  • a first usage side controller that commands the first usage unit makes it possible to switch to a temperature control mode different from the switching state of the heat source side switching mechanism as a temperature control mode commanded by another centralized controller.
  • a temperature control mode suitable for a desired operation without the user performing an operation (command) for switching the temperature control mode.
  • the temperature control mode is switched by the second usage-side controller.
  • the temperature controller mode may be switched by any of the centralized controllers. However, if the central controller is made to switch the temperature control mode, for example, if the temperature control mode is left switched to the evaporating operation state, the operation will be performed under the operating conditions that require cooling operation such as summer. 2 Each time the cooling operation of the unit used is performed, the temperature control mode is switched to the heat dissipation operation state, and if the temperature control mode is left switched to the heat dissipation operation state, the heating operation in the winter season etc.
  • the temperature control mode In the operation conditions that require the temperature control mode, the temperature control mode is switched to the evaporation operation state every time the heating operation of the second usage unit is performed, and the temperature control mode is frequently switched. .
  • the temperature control mode is almost always left switched to the evaporation operation state, so that a cooling operation in summer or the like is necessary.
  • the temperature control mode is switched to the heat dissipation operation state, and the temperature control mode is frequently switched.
  • the first use side controller or the centralized controller is allowed to switch the temperature adjustment mode, the temperature adjustment mode may be frequently switched, which is not preferable.
  • the temperature control mode is switched to the heat dissipation operation state in an operation condition that requires a cooling operation such as in the summer by switching the temperature control mode by the second usage-side controller.
  • the state is maintained, and the state where the temperature control mode is switched to the evaporation operation state is maintained in an operation condition that requires a heating operation such as winter.
  • FIG. 1 is a schematic configuration diagram of a heat pump system according to a first embodiment of the present invention. It is a control logic of the temperature control mode switching control in 1st Embodiment and 2nd Embodiment. It is a schematic block diagram of the heat pump system concerning 2nd Embodiment of this invention. It is a schematic block diagram of the heat pump system concerning 3rd Embodiment of this invention. It is a control logic of the temperature control mode switching control in 3rd Embodiment and 4th Embodiment. It is a schematic block diagram of the heat pump system concerning 4th Embodiment of this invention. It is a schematic block diagram of the heat pump system concerning other embodiment of this invention.
  • FIG. 1 is a schematic configuration diagram of a heat pump system 1 according to the first embodiment of the present invention.
  • the heat pump system 1 is an apparatus capable of performing an operation for heating an aqueous medium using a vapor compression heat pump cycle.
  • the heat pump system 1 mainly includes a heat source unit 2, a first usage unit 4a, second usage units 10a and 10b, a liquid refrigerant communication tube 13, a gas refrigerant communication tube 14, a hot water storage unit 8a, and a hot water heating unit.
  • the heat source side refrigerant circuit 20 is configured, and the first usage unit 4a, the hot water storage unit 8a, and the hot water heating unit 9a are connected via the aqueous medium communication pipes 15a and 16a, whereby the aqueous medium circuit 80a. Is configured.
  • HFC-410A which is a kind of HFC refrigerant
  • HFC-410A is sealed as a heat source refrigerant, and an ester or ether refrigerating machine oil compatible with the HFC refrigerant is used as the heat source. It is enclosed for lubrication of the side compressor 21 (described later). Further, water as an aqueous medium circulates in the aqueous medium circuit 80a.
  • the heat source unit 2 is installed outdoors and connected to the utilization units 4a, 10a, and 10b via the refrigerant communication tubes 13 and 14, and constitutes a part of the heat source side refrigerant circuit 20.
  • the heat source unit 2 mainly includes a heat source side compressor 21, an oil separation mechanism 22, a heat source side switching mechanism 23, a heat source side heat exchanger 24, a heat source side expansion mechanism 25, a suction return pipe 26, and a supercooling.
  • the heat source side compressor 21 is a mechanism that compresses the heat source side refrigerant.
  • a rotary type or scroll type volumetric compression element housed in a casing (not shown)
  • a hermetic compressor driven by a heat source side compressor motor 21a accommodated in the casing is employed.
  • a high-pressure space (not shown) filled with the heat-source-side refrigerant after being compressed by the compression element is formed in the casing of the heat-source-side compressor 21, and refrigerating machine oil is stored in the high-pressure space.
  • the heat source side compressor motor 21a can change the rotation speed (that is, the operating frequency) by an inverter device (not shown), thereby enabling capacity control of the heat source side compressor 21.
  • the oil separation mechanism 22 is a mechanism for separating the refrigeration oil contained in the heat source side refrigerant discharged from the heat source side compressor 21 and returning it to the suction of the heat source side compressor 21, and mainly the heat source side compressor 21.
  • the oil separator 22a provided in the heat source side discharge pipe 21b, and the oil return pipe 22b connecting the oil separator 22a and the heat source side suction pipe 21c of the heat source side compressor 21 are provided.
  • the oil separator 22 a is a device that separates the refrigeration oil contained in the heat source side refrigerant discharged from the heat source side compressor 21.
  • the oil return pipe 22 b has a capillary tube, and is a refrigerant pipe that returns the refrigeration oil separated from the heat source side refrigerant in the oil separator 22 a to the heat source side suction pipe 21 c of the heat source side compressor 21.
  • the heat source side switching mechanism 23 is a heat source side heat radiation operation state in which the heat source side heat exchanger 24 functions as a heat source side refrigerant radiator and a heat source side evaporation operation state in which the heat source side heat exchanger 24 functions as an evaporator of the heat source side refrigerant.
  • the heat source side switching mechanism 23 communicates the heat source side discharge pipe 21b and the first heat source side gas refrigerant pipe 23a, and communicates the second heat source side gas refrigerant pipe 23b and the heat source side suction pipe 21c (heat source side heat dissipation). 1) (refer to the solid line of the heat source side switching mechanism 23 in FIG.
  • the heat source side switching mechanism 23 is not limited to the four-way switching valve, and has a function of switching the flow direction of the heat source side refrigerant as described above, for example, by combining a plurality of electromagnetic valves. It may be configured.
  • the heat source side heat exchanger 24 is a heat exchanger that functions as a heat source side refrigerant radiator or an evaporator by exchanging heat between the heat source side refrigerant and outdoor air, and a heat source side liquid refrigerant tube 24a on the liquid side thereof. Are connected, and the first heat source side gas refrigerant pipe 23a is connected to the gas side thereof.
  • the outdoor air that exchanges heat with the heat source side refrigerant in the heat source side heat exchanger 24 is supplied by the heat source side fan 32 driven by the heat source side fan motor 32a.
  • the heat source side expansion mechanism 25 is an electric expansion valve that performs decompression of the heat source side refrigerant flowing through the heat source side heat exchanger 24, and is provided in the heat source side liquid refrigerant tube 24a.
  • the suction return pipe 26 is a refrigerant pipe that branches a part of the heat source side refrigerant flowing through the heat source side liquid refrigerant pipe 24a and returns it to the suction of the heat source side compressor 21, and here, one end thereof is the heat source side liquid refrigerant pipe 24a. The other end is connected to the heat source side suction pipe 21c.
  • the suction return pipe 26 is provided with a suction return expansion valve 26a capable of opening degree control.
  • the suction return expansion valve 26a is an electric expansion valve.
  • the subcooler 27 heats the heat source side refrigerant flowing through the heat source side liquid refrigerant pipe 24a and the heat source side refrigerant flowing through the suction return pipe 26 (more specifically, the refrigerant after being decompressed by the suction return expansion valve 26a). It is a heat exchanger that performs exchange.
  • the heat source side accumulator 28 is provided in the heat source side suction pipe 21c, and temporarily accumulates the heat source side refrigerant circulating in the heat source side refrigerant circuit 20 before being sucked into the heat source side compressor 21 from the heat source side suction pipe 21c. It is a container for.
  • the liquid side closing valve 29 is a valve provided at a connection portion between the heat source side liquid refrigerant pipe 24 a and the liquid refrigerant communication pipe 13.
  • the gas side shut-off valve 30 is a valve provided at a connection portion between the second heat source side gas refrigerant pipe 23 b and the gas refrigerant communication pipe 14.
  • the heat source unit 2 is provided with various sensors. Specifically, the heat source unit 2 includes a heat source side suction pressure sensor 33 that detects a heat source side suction pressure Ps 1 that is a pressure of the heat source side refrigerant in the suction of the heat source side compressor 21, and a discharge in the heat source side compressor 21.
  • the heat source side discharge pressure sensor 34 that detects the heat source side discharge pressure Pd1 that is the pressure of the heat source side refrigerant, and the heat source side heat exchanger temperature Thx that is the temperature of the heat source side refrigerant on the liquid side of the heat source side heat exchanger 24 are detected.
  • a heat source side heat exchange temperature sensor 35 and an outside air temperature sensor 36 for detecting the outside air temperature To are provided.
  • the liquid refrigerant communication tube 13 is connected to the heat source side liquid refrigerant tube 24a via the liquid side shut-off valve 29, and the heat source side switching mechanism 23 functions as a heat source side refrigerant radiator in the heat source side heat radiation operation state.
  • the heat source side refrigerant can be led out of the heat source unit 2 from the outlet of the heat exchanger 24, and the heat source side switching mechanism 23 functions as an evaporator of the heat source side refrigerant from the outside of the heat source unit 2 in the heat source side evaporation operation state.
  • This is a refrigerant tube capable of introducing the heat source side refrigerant into the inlet of the heat source side heat exchanger 24.
  • the gas refrigerant communication pipe 14 is connected to the second heat source side gas refrigerant pipe 23b via the gas side shutoff valve 30, and the heat source side switching mechanism 23 from outside the heat source unit 2 in the heat source side heat radiation operation state. It is possible to introduce the heat source side refrigerant into the suction of the heat source 21, and the heat source side switching mechanism 23 may lead the heat source side refrigerant out of the heat source unit 2 from the discharge of the heat source side compressor 21 in the heat source side evaporation operation state. Possible refrigerant pipe.
  • the first usage unit 4a is installed indoors, and is connected to the heat source unit 2 and the second usage units 10a and 10b via the refrigerant communication tubes 13 and 14, and constitutes a part of the heat source side refrigerant circuit 20. is doing. Moreover, the 1st utilization unit 4a is connected to the hot water storage unit 8a and the hot water heating unit 9a via the aqueous medium communication pipes 15a and 16a, and comprises a part of aqueous medium circuit 80a.
  • the first usage unit 4a mainly includes a first usage-side heat exchanger 41a, a first usage-side flow rate adjustment valve 42a, and a circulation pump 43a.
  • the first usage-side heat exchanger 41a is a heat exchanger that functions as a heat-source-side refrigerant radiator by performing heat exchange between the heat-source-side refrigerant and the aqueous medium, and the liquid side of the flow path through which the heat-source-side refrigerant flows Is connected to the first use side liquid refrigerant pipe 45a, and the first use side gas refrigerant pipe 54a is connected to the gas side of the flow path through which the heat source side refrigerant flows, and the aqueous medium flows.
  • a first usage-side water inlet pipe 47a is connected to the inlet side of the flow path, and a first usage-side water outlet pipe 48a is connected to the outlet side of the flow path through which the aqueous medium flows.
  • the liquid refrigerant communication tube 13 is connected to the first usage side liquid refrigerant tube 45a, the gas refrigerant communication tube 14 is connected to the first usage side gas refrigerant tube 54a, and the first usage side water inlet port.
  • An aqueous medium communication pipe 15a is connected to the pipe 47a, and an aqueous medium communication pipe 16a is connected to the first usage-side water outlet pipe 48a.
  • the first usage-side flow rate adjustment valve 42a is an electric expansion valve capable of changing the flow rate of the heat source-side refrigerant flowing through the first usage-side heat exchanger 41a by performing opening degree control. It is provided in the refrigerant pipe 45a.
  • the circulation pump 43a is a mechanism for boosting the aqueous medium. Here, a pump in which a centrifugal or positive displacement pump element (not shown) is driven by a circulation pump motor 44a is employed.
  • the circulation pump 43a is provided in the first usage-side water outlet pipe 48a.
  • the circulation pump motor 44a can vary the rotation speed (that is, the operating frequency) by an inverter device (not shown), thereby enabling capacity control of the circulation pump 43a.
  • the 1st utilization side 4a makes the 1st utilization side heat exchanger 41a function as a heat radiator of the heat source side refrigerant
  • the first usage unit 4a is provided with various sensors. Specifically, the first usage unit 4a includes a first usage-side heat exchange temperature sensor that detects a first usage-side refrigerant temperature Tsc1, which is the temperature of the heat-source-side refrigerant on the liquid side of the first usage-side heat exchanger 41a.
  • Tsc1 a first usage-side refrigerant temperature
  • the hot water storage unit 8a is installed indoors, is connected to the first usage unit 4a via the aqueous medium communication pipes 15a and 16a, and constitutes a part of the aqueous medium circuit 80a.
  • the hot water storage unit 8a mainly includes a hot water storage tank 81a and a heat exchange coil 82a.
  • the hot water storage tank 81a is a container for storing water as an aqueous medium supplied for hot water supply, and a hot water supply pipe 83a is connected to the upper part of the hot water storage tank 81a for sending hot water to a faucet or a shower.
  • a water supply pipe 84a for replenishing the aqueous medium consumed by the hot water supply pipe 83a is connected to the lower part.
  • the heat exchange coil 82a is provided in the hot water storage tank 81a, and heats the aqueous medium in the hot water storage tank 81a by exchanging heat between the aqueous medium circulating in the aqueous medium circuit 80a and the aqueous medium in the hot water storage tank 81a.
  • a water medium communication pipe 16a is connected to an inlet of the heat exchanger, and an aqueous medium communication pipe 15a is connected to an outlet of the heat exchanger.
  • the hot water storage unit 8a can heat the aqueous medium in the hot water storage tank 81a by the aqueous medium circulating in the aqueous medium circuit 80a heated in the first usage unit 4a and store it as hot water.
  • a hot water storage unit of a type in which an aqueous medium heated by heat exchange with the aqueous medium heated in the first usage unit 4a is stored in a hot water storage tank is used as the hot water storage unit 8a hot water storage unit of a type in which an aqueous medium heated by heat exchange with the aqueous medium heated in the first usage unit 4a is stored in a hot water storage tank is used. You may employ
  • the hot water storage unit 8a is provided with various sensors. Specifically, the hot water storage unit 8a is provided with a hot water storage temperature sensor 85a for detecting the hot water storage temperature Twh which is the temperature of the aqueous medium stored in the hot water storage tank 81a.
  • -Hot water heating unit The hot water heating unit 9a is installed indoors, is connected to the first usage unit 4a via the aqueous medium communication pipes 15a and 16a, and constitutes a part of the aqueous medium circuit 80a.
  • the hot water heating unit 9a mainly has a heat exchange panel 91a, and constitutes a radiator, a floor heating panel, and the like.
  • the heat exchange panel 91a In the case of a radiator, the heat exchange panel 91a is provided near the wall of the room, and in the case of a floor heating panel, the heat exchange panel 91a is provided under the floor of the room, and the water medium radiator circulating in the water medium circuit 80a.
  • the aqueous medium communication pipe 16a is connected to the inlet of the heat exchanger, and the aqueous medium communication pipe 15a is connected to the outlet of the heat exchanger.
  • the aqueous medium communication pipe 15a is connected to the outlet of the heat exchange coil 82a of the hot water storage unit 8a and the outlet of the heat exchange panel 91a of the hot water heating unit 9a.
  • the aqueous medium communication pipe 16a is connected to the inlet of the heat exchange coil 82a of the hot water storage unit 8a and the inlet of the heat exchange panel 91a of the hot water heating unit 9a.
  • the aqueous medium communication pipe 16a is switched to supply the aqueous medium circulating in the aqueous medium circuit 80a to both the hot water storage unit 8a and the hot water heating unit 9a, or to either the hot water storage unit 8a or the hot water heating unit 9a.
  • the aqueous medium side switching mechanism 161a that can be performed is provided.
  • the aqueous medium side switching mechanism 161a is a three-way valve.
  • the second usage units 10 a and 10 b are installed indoors and connected to the heat source unit 2 via the refrigerant communication tubes 13 and 14 and constitute a part of the heat source side refrigerant circuit 20.
  • the second usage unit 10a mainly includes a second usage-side heat exchanger 101a and a second usage-side flow rate adjustment valve 102a.
  • the second usage-side heat exchanger 101a is a heat exchanger that functions as a heat-source-side refrigerant radiator or evaporator by exchanging heat between the heat-source-side refrigerant and room air as an air medium.
  • a second usage-side liquid refrigerant tube 103a is connected, and a second usage-side gas refrigerant tube 104a is connected to the gas side thereof.
  • a liquid refrigerant communication tube 13 is connected to the second usage side liquid refrigerant tube 103a, and a gas refrigerant communication tube 14 is connected to the second usage side gas refrigerant tube 104a.
  • the air medium that exchanges heat with the heat source side refrigerant in the second usage side heat exchanger 101a is supplied by the usage side fan 105a driven by the usage side fan motor 106a.
  • the use-side fan motor 106a can vary the rotation speed (that is, the operating frequency) by an inverter device (not shown), thereby enabling capacity control of the use-side fan 105a.
  • the second usage side flow rate adjustment valve 102a is an electric expansion valve capable of varying the flow rate of the heat source side refrigerant flowing through the second usage side heat exchanger 101a by performing opening degree control. It is provided in the refrigerant pipe 103a.
  • the second usage unit 10a causes the second usage-side heat exchanger 101a to function as an evaporator of the heat-source-side refrigerant introduced from the liquid refrigerant communication tube 13 when the heat-source-side switching mechanism 23 is in the heat-source-side heat radiation operation state.
  • the second use side heat exchanger 101a functions as a heat source side refrigerant radiator introduced from the gas refrigerant communication tube 14 in the heat source side evaporation operation state when the heat source side switching mechanism 23 is
  • the heat source side refrigerant radiated in the second usage side heat exchanger 101a is led out to the liquid refrigerant communication tube 13, and the air medium is released by the heat dissipation of the heat source side refrigerant in the second usage side heat exchanger 101a. It becomes possible to perform the heating operation for heating.
  • the second usage unit 10a is provided with an indoor temperature sensor 107a that detects the indoor temperature Tr. Since the configuration of the second usage unit 10b is the same as the configuration of the second usage unit 10a, the configuration of the second usage unit 10b is indicated by the subscript “a” indicating the parts of the second usage unit 10a. Instead, the subscript “b” is added and description of each part is omitted.
  • the heat pump system 1 is provided with a first usage-side controller 77a that performs control settings and control commands for hot water supply operation of the first usage unit 4a.
  • the first usage unit 4a is communicably connected. ing.
  • the heat pump system 1 is provided with a second usage-side controller 108a that performs control settings and operation commands for the cooling operation and heating operation of the second usage unit 10a, and the cooling operation and heating operation of the second usage unit 10b.
  • the second usage side controller 108b for performing the control setting and the operation command is provided, and is connected to the second usage units 10a and 10b so as to be communicable.
  • the heat pump system 1 is provided with a control unit (not shown) that performs the following operation and various controls according to the settings and commands of the first and second usage-side controllers. ⁇ Operation> Next, the operation of the heat pump system 1 will be described.
  • the operation of the heat pump system 1 includes a hot water supply operation in which only the hot water supply operation of the first usage unit 4a (that is, the operation of the hot water storage unit 8a and / or the hot water heating unit 9a), the second usage unit 10a and / or the second usage.
  • operations in the four operations of the heat pump system 1 will be described.
  • the heat source side switching mechanism 23 is in the heat source side evaporation operation state (the state indicated by the broken line of the heat source side switching mechanism 23 in FIG. 1). ), And the suction return expansion valve 26a and the second usage-side flow rate adjustment valves 102a and 102b are closed.
  • the aqueous medium circuit 80a the aqueous medium switching mechanism 161a is switched to a state in which the aqueous medium is supplied to the hot water storage unit 8a and / or the hot water heating unit 9a.
  • the switching state of the heat source side switching mechanism 23 as the temperature control mode is switched to the heat source side evaporation operation state by one of the second usage side controllers 108a and 108b, and then the first usage side controller 77a.
  • the operation (hot water supply operation) of the first usage unit 4a (and the hot water storage unit 8a and / or the hot water heating unit 9a) is performed according to the operation command.
  • the low pressure heat source side refrigerant in the refrigeration cycle is sucked into the heat source side compressor 21 through the heat source side suction pipe 21c and compressed to a high pressure in the refrigeration cycle, and then the heat source side refrigerant circuit 20 is cooled. It is discharged to the discharge pipe 21b.
  • the high pressure heat source side refrigerant discharged to the heat source side discharge pipe 21b is separated from the refrigerating machine oil in the oil separator 22a.
  • the refrigerating machine oil separated from the heat source side refrigerant in the oil separator 22a is returned to the heat source side suction pipe 21c through the oil return pipe 22b.
  • the high-pressure heat source side refrigerant from which the refrigerating machine oil is separated is sent from the heat source unit 2 to the gas refrigerant communication tube 14 through the heat source side switching mechanism 23, the second heat source side gas refrigerant tube 23b, and the gas side shut-off valve 30.
  • the high-pressure heat-source-side refrigerant sent to the gas refrigerant communication tube 14 is sent to the first usage unit 4a.
  • the high-pressure heat-source-side refrigerant sent to the first usage unit 4a is sent to the first usage-side heat exchanger 41a through the first usage-side gas refrigerant tube 54a.
  • the high-pressure heat-source-side refrigerant sent to the first usage-side heat exchanger 41a radiates heat by exchanging heat with the aqueous medium circulating in the aqueous-medium circuit 80a by the circulation pump 43a in the first usage-side heat exchanger 41a.
  • the high-pressure heat-source-side refrigerant radiated in the first usage-side heat exchanger 41a is sent from the first usage unit 4a to the liquid refrigerant communication tube 13 through the first usage-side flow rate adjustment valve 42a and the first usage-side liquid refrigerant tube 45a. It is done.
  • the heat source side refrigerant sent to the liquid refrigerant communication tube 13 is sent to the heat source unit 2.
  • the heat source side refrigerant sent to the heat source unit 2 is sent to the supercooler 27 through the liquid side shut-off valve 29.
  • the heat source side refrigerant sent to the subcooler 27 is sent to the heat source side expansion valve 25 without performing heat exchange because the heat source side refrigerant does not flow through the suction return pipe 26.
  • the heat source side refrigerant sent to the heat source side expansion valve 25 is depressurized by the heat source side expansion valve 25 to be in a low-pressure gas-liquid two-phase state, and sent to the heat source side heat exchanger 24 through the heat source side liquid refrigerant tube 24a. It is done.
  • the low-pressure refrigerant sent to the heat source side heat exchanger 24 evaporates by exchanging heat with outdoor air supplied by the heat source side fan 32 in the heat source side heat exchanger 24.
  • the low-pressure heat source side refrigerant evaporated in the heat source side heat exchanger 24 is sent to the heat source side accumulator 28 through the first heat source side gas refrigerant tube 23a and the heat source side switching mechanism 23.
  • the low-pressure heat source side refrigerant sent to the heat source side accumulator 28 is again sucked into the heat source side compressor 21 through the heat source side suction pipe 21c.
  • the aqueous medium circulating in the aqueous medium circuit 80a is heated by the heat radiation of the heat source side refrigerant in the first usage-side heat exchanger 41a.
  • the aqueous medium heated in the first usage-side heat exchanger 41a is sucked into the circulation pump 43a through the first usage-side water outlet pipe 48a, and after the pressure is increased, from the first usage unit 4a to the aqueous medium communication pipe 16a.
  • the aqueous medium sent to the aqueous medium communication pipe 16a is sent to the hot water storage unit 8a and / or the hot water heating unit 9a through the aqueous medium side switching mechanism 161a.
  • the aqueous medium sent to the hot water storage unit 8a exchanges heat with the aqueous medium in the hot water storage tank 81a in the heat exchange coil 82a to radiate heat, thereby heating the aqueous medium in the hot water storage tank 81a.
  • the aqueous medium sent to the hot water heating unit 9a dissipates heat in the heat exchange panel 91a, thereby heating the indoor wall or the like or heating the indoor floor.
  • movement in the hot water supply operation which performs only the hot water supply operation of the 1st utilization unit 4a is performed.
  • -Cooling operation When only the cooling operation of the second usage unit 10a and / or the second usage unit 10b is performed, in the heat source side refrigerant circuit 20, the heat source side switching mechanism 23 is in the heat source side heat dissipation operation state (the heat source side switching mechanism in FIG. 1). 23, the first use side flow rate adjustment valve 42a is closed.
  • the second usage side controller 108a and The operation (cooling operation) of the second usage unit 10a and / or the second usage unit 10b is performed according to the operation command of the second usage side controller 108b.
  • the low pressure heat source side refrigerant in the refrigeration cycle is sucked into the heat source side compressor 21 through the heat source side suction pipe 21c and compressed to a high pressure in the refrigeration cycle, and then the heat source side refrigerant circuit 20 is cooled. It is discharged to the discharge pipe 21b.
  • the high pressure heat source side refrigerant discharged to the heat source side discharge pipe 21b is separated from the refrigerating machine oil in the oil separator 22a.
  • the refrigerating machine oil separated from the heat source side refrigerant in the oil separator 22a is returned to the heat source side suction pipe 21c through the oil return pipe 22b.
  • the high-pressure heat-source-side refrigerant from which the refrigeration oil is separated is sent to the heat-source-side heat exchanger 24 through the heat-source-side switching mechanism 23 and the first heat-source-side gas refrigerant tube 23a.
  • the high-pressure heat-source-side refrigerant sent to the heat-source-side heat exchanger 24 radiates heat by exchanging heat with outdoor air supplied by the heat-source-side fan 32 in the heat source-side heat exchanger 24.
  • the high-pressure heat-source-side refrigerant that has radiated heat in the heat-source-side heat exchanger 24 is sent to the supercooler 27 through the heat-source-side expansion valve 25.
  • the heat-source-side refrigerant sent to the subcooler 27 is cooled so as to be in a supercooled state by exchanging heat with the heat-source-side refrigerant branched from the heat source-side liquid refrigerant tube 24a to the suction return tube 26.
  • the heat source side refrigerant flowing through the suction return pipe 26 is returned to the heat source side suction pipe 21c.
  • the heat source side refrigerant cooled in the subcooler 27 is sent from the heat source unit 2 to the liquid refrigerant communication tube 13 through the heat source side liquid refrigerant tube 24a and the liquid side shut-off valve 29.
  • the high-pressure heat-source-side refrigerant sent to the liquid refrigerant communication tube 13 is sent to the second usage units 10a and 10b (here, it is assumed that both the second usage units 10a and 10b are in cooling operation).
  • the high-pressure heat-source-side refrigerant sent to the second usage units 10a and 10b is sent to the second usage-side flow rate adjustment valves 102a and 102b.
  • the high-pressure heat-source-side refrigerant sent to the second usage-side flow rate adjustment valves 102a and 102b is depressurized by the second usage-side flow rate adjustment valves 102a and 102b to be in a low-pressure gas-liquid two-phase state.
  • the liquid refrigerant pipes 103a and 103b are sent to the second usage side heat exchangers 101a and 101b.
  • the low-pressure heat-source-side refrigerant sent to the second usage-side heat exchangers 101a and 1010b exchanges heat with the air medium supplied by the usage-side fans 105a and 105b in the second usage-side heat exchangers 101a and 101b. Evaporates, thereby cooling the room.
  • the low-pressure heat-source-side refrigerant evaporated in the second usage-side heat exchangers 101a and 101b is sent from the second usage units 10a and 10b to the gas refrigerant communication tube 14 through the second usage-side gas refrigerant tubes 104a and 104b.
  • the low-pressure heat source side refrigerant sent to the gas refrigerant communication tube 14 is sent to the heat source unit 2.
  • the low-pressure heat source side refrigerant sent to the heat source unit 2 is sent to the heat source side accumulator 28 through the gas side shut-off valve 30, the second heat source side gas refrigerant tube 23b, and the heat source side switching mechanism 23.
  • the low-pressure heat source side refrigerant sent to the heat source side accumulator 28 is again sucked into the heat source side compressor 21 through the heat source side suction pipe 21c.
  • the second usage side controller 108a and The operation (heating operation) of the second usage unit 10a and / or the second usage unit 10b is performed according to the operation command of the second usage side controller 108b.
  • the low pressure heat source side refrigerant in the refrigeration cycle is sucked into the heat source side compressor 21 through the heat source side suction pipe 21c and compressed to a high pressure in the refrigeration cycle, and then the heat source side refrigerant circuit 20 is cooled. It is discharged to the discharge pipe 21b.
  • the high pressure heat source side refrigerant discharged to the heat source side discharge pipe 21b is separated from the refrigerating machine oil in the oil separator 22a.
  • the refrigerating machine oil separated from the heat source side refrigerant in the oil separator 22a is returned to the heat source side suction pipe 21c through the oil return pipe 22b.
  • the high-pressure heat source side refrigerant from which the refrigerating machine oil is separated is sent from the heat source unit 2 to the gas refrigerant communication tube 14 through the heat source side switching mechanism 23, the second heat source side gas refrigerant tube 23b, and the gas side shut-off valve 30.
  • the high-pressure heat-source-side refrigerant sent to the gas refrigerant communication tube 14 is sent to the second usage units 10a and 10b (here, it is assumed that both the second usage units 10a and 10b are operated for heating).
  • the high-pressure heat-source-side refrigerant sent to the second usage units 10a, 10b is sent to the second usage-side heat exchangers 101a, 101b through the second usage-side gas refrigerant tubes 104a, 104b.
  • the high-pressure heat-source-side refrigerant sent to the second usage-side heat exchangers 101a and 101b exchanges heat with the air medium supplied by the usage-side fans 105a and 105b in the second usage-side heat exchangers 101a and 101b. To dissipate heat, thereby heating the room.
  • the high-pressure heat-source-side refrigerant radiated in the second usage-side heat exchangers 101a and 101b passes through the second usage-side flow rate adjustment valves 102a and 102b and the second usage-side liquid refrigerant tubes 103a and 103b, and the second usage units 10a and 10b.
  • the heat source side refrigerant sent to the liquid refrigerant communication tube 13 is sent to the heat source unit 2.
  • the heat source side refrigerant sent to the heat source unit 2 is sent to the supercooler 27 through the liquid side shut-off valve 29.
  • the heat source side refrigerant sent to the subcooler 27 is sent to the heat source side expansion valve 25 without performing heat exchange because the heat source side refrigerant does not flow through the suction return pipe 26.
  • the heat source side refrigerant sent to the heat source side expansion valve 25 is depressurized by the heat source side expansion valve 25 to be in a low-pressure gas-liquid two-phase state, and sent to the heat source side heat exchanger 24 through the heat source side liquid refrigerant tube 24a. It is done.
  • the low-pressure refrigerant sent to the heat source side heat exchanger 24 evaporates by exchanging heat with outdoor air supplied by the heat source side fan 32 in the heat source side heat exchanger 24.
  • the low-pressure heat source side refrigerant evaporated in the heat source side heat exchanger 24 is sent to the heat source side accumulator 28 through the first heat source side gas refrigerant tube 23a and the heat source side switching mechanism 23.
  • the low-pressure heat source side refrigerant sent to the heat source side accumulator 28 is again sucked into the heat source side compressor 21 through the heat source side suction pipe 21c.
  • movement in the heating operation which performs only the heating operation of the 2nd usage unit 10a and / or the 2nd usage unit 10b is performed.
  • -Hot water heater operation When the hot water supply operation of the first usage unit 4a and the heating operation of the second usage unit 10a and / or the second usage unit 10b are performed, in the heat source side refrigerant circuit 20, the heat source side switching mechanism 23 is heat source side evaporation. The operation state is switched to the operation state (the state indicated by the broken line of the heat source side switching mechanism 23 in FIG. 1), and the suction return expansion valve 26a is closed.
  • the aqueous medium switching mechanism 161a is switched to a state in which the aqueous medium is supplied to the hot water storage unit 8a and / or the hot water heating unit 9a.
  • the switching state of the heat source side switching mechanism 23 as the temperature control mode is switched to the heat source side evaporation operation state by one of the second usage side controllers 108a and 108b, and then the first usage side controller 77a.
  • the operation (hot water supply operation) of the first usage unit 4a (and the hot water storage unit 8a and / or the hot water heating unit 9a) and the operation command of the second usage side controller 108a and / or the second usage side controller 108b The operation (heating operation) of the second usage unit 10a and / or the second usage unit 10b is performed.
  • the low pressure heat source side refrigerant in the refrigeration cycle is sucked into the heat source side compressor 21 through the heat source side suction pipe 21c and compressed to a high pressure in the refrigeration cycle, and then the heat source side refrigerant circuit 20 is cooled. It is discharged to the discharge pipe 21b.
  • the high pressure heat source side refrigerant discharged to the heat source side discharge pipe 21b is separated from the refrigerating machine oil in the oil separator 22a.
  • the refrigerating machine oil separated from the heat source side refrigerant in the oil separator 22a is returned to the heat source side suction pipe 21c through the oil return pipe 22b.
  • the high-pressure heat source side refrigerant from which the refrigerating machine oil is separated is sent from the heat source unit 2 to the gas refrigerant communication tube 14 through the heat source side switching mechanism 23, the second heat source side gas refrigerant tube 23b, and the gas side shut-off valve 30.
  • the high-pressure heat-source-side refrigerant sent to the gas refrigerant communication tube 14 will be described on the assumption that the first usage unit 4a and the second usage units 10a and 10b (here, both the second usage units 10a and 10b are heated). ).
  • the high-pressure heat-source-side refrigerant sent to the second usage units 10a, 10b is sent to the second usage-side heat exchangers 101a, 101b through the second usage-side gas refrigerant tubes 104a, 104b.
  • the high-pressure heat-source-side refrigerant sent to the second usage-side heat exchangers 101a and 101b exchanges heat with the air medium supplied by the usage-side fans 105a and 105b in the second usage-side heat exchangers 101a and 101b. To dissipate heat, thereby heating the room.
  • the high-pressure heat-source-side refrigerant radiated in the second usage-side heat exchangers 101a and 101b passes through the second usage-side flow rate adjustment valves 102a and 102b and the second usage-side liquid refrigerant tubes 103a and 103b, and the second usage units 10a and 10b.
  • the high-pressure heat-source-side refrigerant sent to the first usage unit 4a is sent to the first usage-side heat exchanger 41a through the first usage-side gas refrigerant tube 54a.
  • the high-pressure heat-source-side refrigerant sent to the first usage-side heat exchanger 41a exchanges heat with the low-pressure usage-side refrigerant in the refrigeration cycle circulating in the usage-side refrigerant circuit 40a in the first usage-side heat exchanger 41a. To dissipate heat.
  • the high-pressure heat-source-side refrigerant radiated in the first usage-side heat exchanger 41a is sent from the first usage unit 4a to the liquid refrigerant communication tube 13 through the first usage-side flow rate adjustment valve 42a and the first usage-side liquid refrigerant tube 45a. It is done.
  • the heat-source-side refrigerant sent from the second usage units 10a and 10b and the first usage unit 4a to the liquid refrigerant communication tube 13 merges in the liquid refrigerant communication tube 13 and is sent to the heat source unit 2.
  • the heat source side refrigerant sent to the heat source unit 2 is sent to the supercooler 27 through the liquid side shut-off valve 29.
  • the heat source side refrigerant sent to the subcooler 27 is sent to the heat source side expansion valve 25 without performing heat exchange because the heat source side refrigerant does not flow through the suction return pipe 26.
  • the heat source side refrigerant sent to the heat source side expansion valve 25 is depressurized by the heat source side expansion valve 25 to be in a low-pressure gas-liquid two-phase state, and sent to the heat source side heat exchanger 24 through the heat source side liquid refrigerant tube 24a. It is done.
  • the low-pressure refrigerant sent to the heat source side heat exchanger 24 evaporates by exchanging heat with outdoor air supplied by the heat source side fan 32 in the heat source side heat exchanger 24.
  • the low-pressure heat source side refrigerant evaporated in the heat source side heat exchanger 24 is sent to the heat source side accumulator 28 through the first heat source side gas refrigerant tube 23a and the heat source side switching mechanism 23.
  • the low-pressure heat source side refrigerant sent to the heat source side accumulator 28 is again sucked into the heat source side compressor 21 through the heat source side suction pipe 21c.
  • the aqueous medium circulating in the aqueous medium circuit 80a is heated by the heat radiation of the heat source side refrigerant in the first usage-side heat exchanger 41a.
  • the aqueous medium heated in the first usage-side heat exchanger 41a is drawn into the circulation pump 43a through the first usage-side water outlet pipe 48a, and after the pressure is increased, the first usage unit 4a supplies the aqueous medium communication pipe 16a.
  • the aqueous medium sent to the aqueous medium communication pipe 16a is sent to the hot water storage unit 8a and / or the hot water heating unit 9a through the aqueous medium side switching mechanism 161a.
  • the aqueous medium sent to the hot water storage unit 8a exchanges heat with the aqueous medium in the hot water storage tank 81a in the heat exchange coil 82a to radiate heat, thereby heating the aqueous medium in the hot water storage tank 81a.
  • the aqueous medium sent to the hot water heating unit 9a dissipates heat in the heat exchange panel 91a, thereby heating the indoor wall or the like or heating the indoor floor.
  • the hot water supply operation of the first usage unit 4a and the heating operation of the second usage unit 10a and / or the second usage unit 10b are performed.
  • the hot water supply operation and the heating operation cannot be performed while the temperature control mode is switched to the heat source side heat radiation operation state, and the temperature control mode is switched to the heat source side evaporation operation state. If it is left alone, the cooling operation cannot be performed. That is, in order to perform a desired operation in the first usage unit 4a and the second usage unit 10a, 10b, a hot water supply operation command from the first usage side controller 77a to the first usage unit 4a or a second usage side controller 108a.
  • the heat pump system 1 includes the first usage unit 4a and the second usage unit 10a, 10b individually supplied with hot water supply operation, cooling operation or heating. You can not drive by selecting driving.
  • the temperature control mode is in the heat source side heat radiation operation state (that is, even if the second usage units 10a and 10b are in the cooling operation or not in the cooling operation, the second usage
  • the side controller 108a commands the temperature control mode to enter the heat source side heat radiation operation state
  • the priority hot water supply operation steps S7 to S9, which is an operation for switching the temperature control mode to the heat source side evaporation operation state and performing the hot water supply operation of the first usage unit 4a.
  • the commanded temperature control mode in this case, the second user side controller 108a specifies the temperature control mode). Operation in the temperature control mode) (step S1, S4) is to be carried out being.
  • step S1 the operation state in step S1
  • step S2 it is determined whether or not the condition A is satisfied.
  • the hot water supply operation is performed in the first usage unit 4a.
  • the time tm3 is a time set in step S10 described later.
  • the temperature control mode is on the heat source side.
  • the hot water supply operation is instructed, that is, the first use in accordance with the hot water supply operation command from the first use side controller 77a. Since in a state where it is not possible to heat the aqueous medium be started the operation of the knitting 4a, towards the priority hot-water supply operation (step S7 ⁇ S9), the process proceeds to step S3 and subsequent steps.
  • steps S3 and S4 although the condition A is satisfied, the process does not immediately shift to the preferential hot water supply operation (steps S7 to S9), but in step S3, a predetermined first time tm1 is counted.
  • the first time tm1 corresponds to a time interval from the end of the processing of step S2 to the processing of steps S5 and S6, and is set to about several minutes to 10 minutes.
  • step S5 it is determined whether or not the condition B is satisfied.
  • the low temperature condition temperature Tol corresponds to the highest temperature assumed to perform the heating operation of the second usage units 10a and 10b, and is set to about 15 ° C.
  • Step S5 when it is determined that the condition B is not satisfied, that is, when the temperature control mode is the heat source side evaporation operation state (that is, “temperature control mode ⁇ cooling”), or the first usage side
  • the condition D of Step S6 is satisfied
  • the second usage of Step S1 is performed.
  • step S7 the process proceeds to the priority hot-water supply operation (step S7 ⁇ S9).
  • step S7 counting of a predetermined second time tm2 is started.
  • the second time tm2 corresponds to the time for performing the priority hot water supply operation, and is set to about 10 to 30 minutes.
  • the circulation pump 43a is started and the first usage-side flow rate adjustment valve 41a is opened to start the hot water supply operation (that is, priority hot water supply operation) of the first usage unit 4a.
  • the second usage units 10a and 10b are switched to a state in which heating operation is performed.
  • the second usage units 10a and 10b are performing the cooling operation until the priority hot water supply operation is started, the second usage units 10a and 10b are in a state of performing the heating operation, and the priority hot water supply operation is being performed.
  • the heating operation is started when the second usage-side controllers 108a and 108b are instructed to the second usage units 10a and 10b, the indoor comfort is impaired, which is not preferable. Therefore, in the heat pump system 1, the cooling operation of the second usage units 10a and 10b is prohibited during the priority hot water supply operation.
  • the second usage unit 10a to which the cooling operation is instructed from the second usage-side controllers 108a and 108b If the operation of the use side fans 105a and 105b is also stopped for 10b, the user may misunderstand that the failure of the second use units 10a and 10b has occurred. Therefore, in the heat pump system 1, the second usage-side flow rate adjustment valves 102a and 102b of the second usage units 10a and 10b for which the cooling operation is commanded from the second usage-side controllers 108a and 108b during the priority hot water supply operation.
  • the use-side fans 105a and 105b are operated in a state where the cooling operation is stopped by performing a closing operation or the like.
  • the operating frequency of the use side fans 105a and 105b is preferably set to the lowest frequency in order to prevent indoor drafts.
  • the operating state of the second usage units 10a and 10b in the second usage-side controllers 108a and 108b in conjunction with stopping the cooling operation of the second usage units 10a and 10b, the operating state of the second usage units 10a and 10b in the second usage-side controllers 108a and 108b. If the display is changed (that is, the cooling operation is changed to stop), the user may misunderstand that the failure of the second usage units 10a and 10b has occurred. Therefore, in this heat pump system 1, even when the cooling operation of the second usage units 10a and 10b in the priority hot water supply operation is stopped, the display indicating that the second usage-side controllers 108a and 108b are in the cooling operation is maintained. ing. This priority hot water supply operation is continued until the condition C is satisfied in step S9.
  • the high temperature condition temperature Toh corresponds to the lowest temperature at which the cooling operation of the second usage units 10a and 10b is assumed, and is set to about 20 ° C.
  • the priority hot water supply operation is in a state in which it is determined in step S9 that the condition C is satisfied, that is, the hot water supply operation can be performed without performing the priority hot water supply operation, or the hot water supply operation becomes unnecessary.
  • the priority hot water supply operation is continued until the second time tm2 is continued, and thereafter, the process shifts to the process (steps S10 and S1) for returning to the operation in the temperature control mode commanded by the second usage-side controller 108a.
  • step S10 counting of a predetermined third time tm3 is started, and in step S1, the operation in the temperature control mode commanded by the second usage-side controller 108a is started. Processing to return is performed.
  • the third time tm3 corresponds to the time during which the operation in the temperature control mode commanded by the second use side controller 108a is performed without performing the priority hot water supply operation when the priority hot water supply operation is requested. It is set to about 5 to 25 minutes. For example, when the hot water supply operation of the first usage unit 4a is requested during the cooling operation of the second usage units 10a and 10b, the priority hot water supply operation is performed for the second time tm2, and the cooling operation is performed for the third time tm3.
  • This heat pump system 1 has the following features. -A- In this heat pump system 1, as in the temperature control mode switching control described above, the second usage side controllers 108 a and 108 b (in this case, the second usage side controller 108 a) that commands the second usage units 10 a and 10 b are provided. It is possible to operate by switching to a temperature control mode different from the switching state of the heat source side switching mechanism 23 as the commanded temperature control mode. For example, the temperature control mode is switched to the heat source side heat radiation operation state. When the hot water supply operation is performed in the above state, the user is not required to perform an operation (command) for switching the temperature control mode, for example, the temperature control mode is switched to the heat source side evaporation operation state. Switching to temperature control mode can be performed.
  • the temperature control mode is switched as in the commanded temperature control mode (here, the second usage-side controller 108 a) as in steps S 2, S 5, S 6, and S 9 in the temperature control mode switching control described above. Is switched based on at least one of the switching state of the heat source side switching mechanism 23 as the temperature control mode commanded by the engine and the outside air temperature To, so that the temperature control mode can be switched appropriately. Further, in this heat pump system 1, whether or not the temperature control mode needs to be switched in two stages as in steps S1 to S6 in the temperature control mode switching control described above (in this case, whether or not the priority hot water supply operation needs to be performed). ) Is determined, it is difficult for temperature control mode hunting to occur.
  • -C- In this heat pump system 1, when the temperature adjustment mode is in the heat source side heat radiation operation state, when the first use side controller 77a instructs the first use unit 4a to perform the hot water supply operation, the temperature adjustment mode is set to the heat source mode. By switching from the side heat radiation operation state to the heat source side evaporation operation state, the hot water supply operation (that is, the priority hot water supply operation) of the first usage unit 4a can be performed. The user can perform hot water supply operation as necessary without performing an operation (command) for switching the temperature control mode to the heat source side evaporation operation state.
  • -D- In this heat pump system 1, when performing the priority hot water supply operation, the cooling operation of the second usage units 10 a and 10 b is prohibited.
  • the temperature control mode for performing the priority hot water supply operation is evaporated from the heat dissipation operation state.
  • the second usage units 10a and 10b that have been performing the cooling operation enter a state in which the heating operation is performed.
  • the cooling operation is commanded to 10b, the heating operation is not started, and this can prevent the indoor comfort from being impaired when the priority hot water supply operation is performed.
  • the second usage units 10a and 10b for which the cooling operation is instructed from the second usage-side controllers 108a and 108b are used in the state where the cooling operation is stopped during the priority hot water supply operation. Since 105a and 105b are operated, when the cooling operation of the second usage units 10a and 10b is prohibited, the operation of the usage-side fans 105a and 105b of the second usage units 10a and 10b during the cooling operation is stopped. Thus, it is possible to prevent the user from misunderstanding that the failure of the second usage units 10a and 10b has occurred by performing the priority hot water supply operation.
  • a heat exchanger that exchanges heat between the heat-source-side refrigerant and the heat-source-side refrigerant that is introduced is used as a heat exchanger, and a first-side use unit 4a uses a use-side compressor 62a (described later) that compresses the use-side refrigerant.
  • a refrigerant-water heat exchanger 65a (described later) that functions as a heat radiator for the use side refrigerant and can heat the aqueous medium
  • the use side refrigerant circulates together with the first use side heat exchanger 41a.
  • the use side refrigerant circuit 40a is configured.
  • the configuration of the heat pump system 200 will be described.
  • FIG. 3 is a schematic configuration diagram of a heat pump system 200 according to the second embodiment of the present invention.
  • the heat pump system 200 is an apparatus that can perform an operation of heating an aqueous medium using a vapor compression heat pump cycle.
  • the heat pump system 200 mainly includes a heat source unit 2, a first usage unit 4a, second usage units 10a and 10b, a liquid refrigerant communication tube 13, a gas refrigerant communication tube 14, a hot water storage unit 8a, and a hot water heating unit.
  • the heat source side refrigerant circuit 20 is constituted, the first usage unit 4a constitutes the usage side refrigerant circuit 40a, and the first usage unit 4a, the hot water storage unit 8a, and the hot water heating unit 9a are connected to the aqueous medium communication pipe 15a. , 16a to form an aqueous medium circuit 80a.
  • HFC-410A which is a kind of HFC refrigerant
  • ester or ether refrigerating machine oil compatible with the HFC refrigerant is used as the heat source. It is enclosed for lubrication of the side compressor 21.
  • HFC-134a which is a kind of HFC refrigerant
  • HFC-134a is sealed in the use side refrigerant circuit 40a as a use side refrigerant, and ester or ether type refrigerating machine oil having compatibility with the HFC refrigerant. Is enclosed for lubrication of the use side compressor 62a.
  • the pressure corresponding to saturation gas temperature 65 degreeC is 2.8 Mpa or less at the maximum at a gauge pressure, Preferably, it is 2.0 Mpa.
  • the following refrigerants are preferably used.
  • HFC-134a is a kind of refrigerant having such saturation pressure characteristics.
  • water as an aqueous medium circulates in the aqueous medium circuit 80a.
  • the heat source unit 2, the second usage unit 10a, the hot water storage unit 8a, the hot water heating unit 9a, and the liquid refrigerant communication having the same configuration as the heat pump system 1 (see FIG. 1) in the first embodiment.
  • the configurations of the pipe 13, the gas refrigerant communication pipe 14, the aqueous medium communication pipes 15a and 16a, the first usage side controller 77a, and the second usage side controllers 108a and 108b are denoted by the same reference numerals, and description thereof is omitted. Only the configuration of the first usage unit 4a will be described.
  • the first usage unit 4 a is installed indoors and connected to the heat source unit 2 via the refrigerant communication tubes 13 and 14 and constitutes a part of the heat source side refrigerant circuit 20. Moreover, the 1st utilization unit 4a comprises the utilization side refrigerant circuit 40a. Furthermore, the 1st utilization unit 4a is connected to the hot water storage unit 8a and the hot water heating unit 9a via the aqueous medium communication pipes 15a and 16a, and constitutes a part of the aqueous medium circuit 80a.
  • the first usage unit 4a mainly includes a first usage-side heat exchanger 41a, a first usage-side flow rate adjustment valve 42a, a usage-side compressor 62a, a refrigerant-water heat exchanger 65a, and a refrigerant-hydrothermal exchange. It has a side flow rate adjustment valve 66a, a use side accumulator 67a, and a circulation pump 43a.
  • the first usage-side heat exchanger 41a is a heat exchanger that functions as a radiator for the heat-source-side refrigerant by performing heat exchange between the heat-source-side refrigerant and the usage-side refrigerant, and is a liquid in a flow path through which the heat-source-side refrigerant flows.
  • a first use side liquid refrigerant tube 45a is connected to the side, and a first use side gas refrigerant tube 54a is connected to the gas side of the flow path through which the heat source side refrigerant flows, and the use side refrigerant.
  • a cascade side liquid refrigerant pipe 68a is connected to the liquid side of the flow path through which the refrigerant flows, and a second cascade side gas refrigerant pipe 69a is connected to the gas side of the flow path through which the use side refrigerant flows.
  • the liquid refrigerant communication pipe 13 is connected to the first usage side liquid refrigerant pipe 45a, the gas refrigerant communication pipe 14 is connected to the first usage side gas refrigerant pipe 54a, and the cascade side liquid refrigerant pipe 68a.
  • the refrigerant-water heat exchanger 65a is connected to the second cascade side gas refrigerant pipe 69a, and the use side compressor 62a is connected to the second cascade side gas refrigerant pipe 69a.
  • the first usage-side flow rate adjustment valve 42a is an electric expansion valve capable of changing the flow rate of the heat source-side refrigerant flowing through the first usage-side heat exchanger 41a by performing opening degree control. It is provided in the refrigerant pipe 45a.
  • the use side compressor 62a is a mechanism for compressing the use side refrigerant.
  • a rotary type or scroll type volumetric compression element housed in a casing (not shown) is used.
  • a hermetic compressor driven by a use side compressor motor 63a accommodated in the casing is employed.
  • a high-pressure space (not shown) filled with the heat-source-side refrigerant after being compressed by the compression element is formed in the casing of the use-side compressor 62a, and refrigeration oil is stored in the high-pressure space.
  • the use-side compressor motor 63a can vary the rotation speed (that is, the operating frequency) by an inverter device (not shown), thereby enabling capacity control of the use-side compressor 62a.
  • a cascade side discharge pipe 70a is connected to the discharge of the use side compressor 62a, and a cascade side intake pipe 71a is connected to the intake of the use side compressor 62a.
  • the cascade side suction pipe 71a is connected to the second cascade side gas refrigerant pipe 69a.
  • the refrigerant-water heat exchanger 65a is a heat exchanger that functions as a heat radiator for the usage-side refrigerant by exchanging heat between the usage-side refrigerant and the aqueous medium.
  • the cascade side liquid refrigerant pipe 68a is connected to the gas side of the flow path through which the use side refrigerant flows, and the first cascade side gas refrigerant pipe 72a is connected to the flow path through which the aqueous medium flows.
  • a first usage-side water inlet pipe 47a is connected to the inlet side, and a first usage-side water outlet pipe 48a is connected to the outlet side of the flow path through which the aqueous medium flows.
  • the first cascade side gas refrigerant pipe 72a is connected to the cascade side discharge pipe 70a, the aqueous medium communication pipe 15a is connected to the first use side water inlet pipe 47a, and the first use side water outlet pipe is connected.
  • the aqueous medium communication pipe 16a is connected to 48a.
  • the refrigerant-water heat exchange side flow rate adjustment valve 66a is an electric expansion valve capable of varying the flow rate of the use side refrigerant flowing through the refrigerant-water heat exchanger 65a by controlling the opening degree. It is provided in the pipe 68a.
  • the use side accumulator 67a is provided in the cascade side suction pipe 71a, and temporarily stores the use side refrigerant circulating in the use side refrigerant circuit 40a before being sucked from the cascade side suction pipe 71a into the use side compressor 62a. It is a container for.
  • the use side compressor 62a, the refrigerant-water heat exchanger 65a, the refrigerant-water heat exchange side flow rate adjustment valve 66a, and the first use side heat exchanger 41a connect the refrigerant pipes 71a, 70a, 72a, 68a, 69a.
  • the use-side refrigerant circuit 40a is configured by being connected to each other.
  • the circulation pump 43a is a mechanism for boosting the aqueous medium.
  • a pump in which a centrifugal or positive displacement pump element (not shown) is driven by a circulation pump motor 44a is employed.
  • the circulation pump 43a is provided in the first usage-side water outlet pipe 48a.
  • the circulation pump motor 44a can vary the rotation speed (that is, the operating frequency) by an inverter device (not shown), thereby enabling capacity control of the circulation pump 43a.
  • the first usage unit 4a causes the first usage-side heat exchanger 41a to radiate heat by causing the first usage-side heat exchanger 41a to function as a heat radiator for the heat-source-side refrigerant introduced from the gas refrigerant communication tube 14.
  • the used heat source side refrigerant is led out to the liquid refrigerant communication pipe 13, and the use side refrigerant circulating in the use side refrigerant circuit 40a is heated by the heat radiation of the heat source side refrigerant in the first use side heat exchanger 41a, and this heated use side After the refrigerant is compressed in the use side compressor 62a, it is possible to perform a hot water supply operation for heating the aqueous medium by radiating heat in the refrigerant-water heat exchanger 65a.
  • the first usage unit 4a is provided with various sensors.
  • the first usage unit 4a includes a first usage-side heat exchange temperature sensor that detects the first usage-side refrigerant temperature Tsc1, which is the temperature of the heat-source-side refrigerant on the liquid side of the first usage-side heat exchanger 41a.
  • a first refrigerant-water heat exchanger temperature sensor 73a for detecting a cascade-side refrigerant temperature Tsc2 which is a temperature of a use-side refrigerant on the liquid side of the refrigerant-water heat exchanger 65a, and an inlet of the refrigerant-water heat exchanger 65a
  • An aqueous medium outlet temperature sensor 51a that detects an aqueous medium inlet temperature Twr that is the temperature of the aqueous medium in the water medium, and an aqueous medium outlet that detects an aqueous medium outlet temperature Twl that is the temperature of the aqueous medium at the outlet of the refrigerant-water heat exchanger 65a
  • a temperature sensor 52a, a use side suction pressure sensor 74a that detects a use side suction pressure Ps2 that is a pressure of the use side refrigerant in the suction of the use side compressor 62a, and a discharge of the use side compressor 62a
  • the heat pump system 200 is provided with a control unit (not shown) that performs the following operations and various controls according to the settings and commands of the first and second usage-side controllers. ⁇ Operation> Next, the operation of the heat pump system 200 will be described. As the operation of the heat pump system 200, similarly to the heat pump system 1 of the first embodiment, a hot water supply operation in which only the hot water supply operation of the first usage unit 4a (that is, the operation of the hot water storage unit 8a and / or the hot water heating unit 9a) is performed.
  • the cooling operation that performs only the cooling operation of the second usage unit 10a and / or the second usage unit 10b, the heating operation that performs only the heating operation of the second usage unit 10a and / or the second usage unit 10b, and the first usage There is a hot water supply and heating operation in which the hot water supply operation of the unit 4a and the heating operation of the second usage unit 10a and / or the second usage unit 10b are performed.
  • the switching state of the heat source side switching mechanism 23 as the temperature control mode is switched to the heat source side evaporation operation state by one of the second usage side controllers 108a and 108b, and then the first usage side controller 77a.
  • the operation (hot water supply operation) of the first usage unit 4a (and the hot water storage unit 8a and / or the hot water heating unit 9a) is performed according to the operation command.
  • the low pressure heat source side refrigerant in the refrigeration cycle is sucked into the heat source side compressor 21 through the heat source side suction pipe 21c and compressed to a high pressure in the refrigeration cycle, and then the heat source side refrigerant circuit 20 is cooled. It is discharged to the discharge pipe 21b.
  • the high pressure heat source side refrigerant discharged to the heat source side discharge pipe 21b is separated from the refrigerating machine oil in the oil separator 22a.
  • the refrigerating machine oil separated from the heat source side refrigerant in the oil separator 22a is returned to the heat source side suction pipe 21c through the oil return pipe 22b.
  • the high-pressure heat source side refrigerant from which the refrigerating machine oil is separated is sent from the heat source unit 2 to the gas refrigerant communication tube 14 through the heat source side switching mechanism 23, the second heat source side gas refrigerant tube 23b, and the gas side shut-off valve 30.
  • the high-pressure heat-source-side refrigerant sent to the gas refrigerant communication tube 14 is sent to the first usage unit 4a.
  • the high-pressure heat-source-side refrigerant sent to the first usage unit 4a is sent to the first usage-side heat exchanger 41a through the first usage-side gas refrigerant tube 54a.
  • the high-pressure heat-source-side refrigerant sent to the first usage-side heat exchanger 41a exchanges heat with the low-pressure usage-side refrigerant in the refrigeration cycle circulating in the usage-side refrigerant circuit 40a in the first usage-side heat exchanger 41a. To dissipate heat.
  • the high-pressure heat-source-side refrigerant radiated in the first usage-side heat exchanger 41a is sent from the first usage unit 4a to the liquid refrigerant communication tube 13 through the first usage-side flow rate adjustment valve 42a and the first usage-side liquid refrigerant tube 45a. It is done.
  • the heat source side refrigerant sent to the liquid refrigerant communication tube 13 is sent to the heat source unit 2.
  • the heat source side refrigerant sent to the heat source unit 2 is sent to the supercooler 27 through the liquid side shut-off valve 29.
  • the heat source side refrigerant sent to the subcooler 27 is sent to the heat source side expansion valve 25 without performing heat exchange because the heat source side refrigerant does not flow through the suction return pipe 26.
  • the heat source side refrigerant sent to the heat source side expansion valve 25 is depressurized by the heat source side expansion valve 25 to be in a low-pressure gas-liquid two-phase state, and sent to the heat source side heat exchanger 24 through the heat source side liquid refrigerant tube 24a. It is done.
  • the low-pressure refrigerant sent to the heat source side heat exchanger 24 evaporates by exchanging heat with outdoor air supplied by the heat source side fan 32 in the heat source side heat exchanger 24.
  • the low-pressure heat source side refrigerant evaporated in the heat source side heat exchanger 24 is sent to the heat source side accumulator 28 through the first heat source side gas refrigerant tube 23a and the heat source side switching mechanism 23.
  • the low-pressure heat source side refrigerant sent to the heat source side accumulator 28 is again sucked into the heat source side compressor 21 through the heat source side suction pipe 21c.
  • the low-pressure usage-side refrigerant in the refrigeration cycle circulating in the usage-side refrigerant circuit 40a is heated and evaporated by the heat radiation of the heat source-side refrigerant in the first usage-side heat exchanger 41a.
  • the low-pressure usage-side refrigerant evaporated in the first usage-side heat exchanger 41a is sent to the usage-side accumulator 67a through the second cascade-side gas refrigerant tube 69a.
  • the low-pressure use-side refrigerant sent to the use-side accumulator 67a is sucked into the use-side compressor 62a through the cascade-side suction pipe 71a, compressed to a high pressure in the refrigeration cycle, and then discharged to the cascade-side discharge pipe 70a.
  • the high-pressure use-side refrigerant discharged to the cascade-side discharge pipe 70a is sent to the refrigerant-water heat exchanger 65a through the first cascade-side gas refrigerant pipe 72a.
  • the high-pressure use-side refrigerant sent to the refrigerant-water heat exchanger 65a radiates heat by exchanging heat with the aqueous medium circulating in the aqueous medium circuit 80a by the circulation pump 43a in the refrigerant-water heat exchanger 65a.
  • the high-pressure use-side refrigerant that has radiated heat in the refrigerant-water heat exchanger 65a is decompressed in the refrigerant-water heat exchange side flow rate control valve 66a to become a low-pressure gas-liquid two-phase state, and passes through the cascade-side liquid refrigerant pipe 68a. Again, it is sent to the 1st utilization side heat exchanger 41a.
  • the aqueous medium circulating in the aqueous medium circuit 80a is heated by the heat radiation of the use-side refrigerant in the refrigerant-water heat exchanger 65a.
  • the aqueous medium heated in the refrigerant-water heat exchanger 65a is drawn into the circulation pump 43a through the first usage-side water outlet pipe 48a, and after being pressurized, is sent from the first usage unit 4a to the aqueous medium communication pipe 16a. It is done.
  • the aqueous medium sent to the hot water storage unit 8a exchanges heat with the aqueous medium in the hot water storage tank 81a in the heat exchange coil 82a to radiate heat, thereby heating the aqueous medium in the hot water storage tank 81a.
  • the aqueous medium sent to the hot water heating unit 9a dissipates heat in the heat exchange panel 91a, thereby heating the indoor wall or the like or heating the indoor floor.
  • the heat source side switching mechanism 23 is in the heat source side heat radiation operation state (the heat source side switching mechanism of FIG. 3).
  • the first use side flow rate adjustment valve 42a is closed.
  • the second usage side controller 108a after switching the switching state of the heat source side switching mechanism 23 as the temperature control mode to the heat source side heat radiation operation state by one of the second usage side controllers 108a and 108b, the second usage side controller 108a and The operation (cooling operation) of the second usage unit 10a and / or the second usage unit 10b is performed according to the operation command of the second usage side controller 108b. Since the cooling operation is the same as the cooling operation in the heat pump system 1 of the first embodiment, the description thereof is omitted here.
  • the second usage side controller 108a and The operation (heating operation) of the second usage unit 10a and / or the second usage unit 10b is performed according to the operation command of the second usage side controller 108b. Since the heating operation is the same as the heating operation in the heat pump system 1 of the first embodiment, the description thereof is omitted here.
  • the heat source side switching mechanism 23 is heat source side evaporation.
  • the operation state is switched to the operation state (the state indicated by the broken line of the heat source side switching mechanism 23 in FIG. 3), and the suction return expansion valve 26a is closed.
  • the aqueous medium circuit 80a the aqueous medium switching mechanism 161a is switched to a state in which the aqueous medium is supplied to the hot water storage unit 8a and / or the hot water heating unit 9a.
  • the switching state of the heat source side switching mechanism 23 as the temperature control mode is switched to the heat source side evaporation operation state by one of the second usage side controllers 108a and 108b, and then the first usage side controller 77a.
  • the operation command the operation (hot water supply operation) of the first usage unit 4a (and the hot water storage unit 8a and / or the hot water heating unit 9a) and the operation command of the second usage side controller 108a and / or the second usage side controller 108b
  • the operation (heating operation) of the second usage unit 10a and / or the second usage unit 10b is performed.
  • the low pressure heat source side refrigerant in the refrigeration cycle is sucked into the heat source side compressor 21 through the heat source side suction pipe 21c and compressed to a high pressure in the refrigeration cycle, and then the heat source side refrigerant circuit 20 is cooled. It is discharged to the discharge pipe 21b.
  • the high pressure heat source side refrigerant discharged to the heat source side discharge pipe 21b is separated from the refrigerating machine oil in the oil separator 22a.
  • the refrigerating machine oil separated from the heat source side refrigerant in the oil separator 22a is returned to the heat source side suction pipe 21c through the oil return pipe 22b.
  • the high-pressure heat source side refrigerant from which the refrigerating machine oil is separated is sent from the heat source unit 2 to the gas refrigerant communication tube 14 through the heat source side switching mechanism 23, the second heat source side gas refrigerant tube 23b, and the gas side shut-off valve 30.
  • the high-pressure heat-source-side refrigerant sent to the gas refrigerant communication tube 14 will be described on the assumption that the first usage unit 4a and the second usage units 10a and 10b (here, both the second usage units 10a and 10b are heated). ).
  • the high-pressure heat-source-side refrigerant sent to the second usage units 10a, 10b is sent to the second usage-side heat exchangers 101a, 101b through the second usage-side gas refrigerant tubes 104a, 104b.
  • the high-pressure heat-source-side refrigerant sent to the second usage-side heat exchangers 101a and 101b exchanges heat with the air medium supplied by the usage-side fans 105a and 105b in the second usage-side heat exchangers 101a and 101b. To dissipate heat, thereby heating the room.
  • the high-pressure heat-source-side refrigerant radiated in the second usage-side heat exchangers 101a and 101b passes through the second usage-side flow rate adjustment valves 102a and 102b and the second usage-side liquid refrigerant tubes 103a and 103b, and the second usage units 10a and 10b.
  • the high-pressure heat-source-side refrigerant sent to the first usage unit 4a is sent to the first usage-side heat exchanger 41a through the first usage-side gas refrigerant tube 54a.
  • the high-pressure heat-source-side refrigerant sent to the first usage-side heat exchanger 41a exchanges heat with the low-pressure usage-side refrigerant in the refrigeration cycle circulating in the usage-side refrigerant circuit 40a in the first usage-side heat exchanger 41a. To dissipate heat.
  • the high-pressure heat-source-side refrigerant radiated in the first usage-side heat exchanger 41a is sent from the first usage unit 4a to the liquid refrigerant communication tube 13 through the first usage-side flow rate adjustment valve 42a and the first usage-side liquid refrigerant tube 45a. It is done.
  • the heat-source-side refrigerant sent from the second usage units 10a and 10b and the first usage unit 4a to the liquid refrigerant communication tube 13 merges in the liquid refrigerant communication tube 13 and is sent to the heat source unit 2.
  • the heat source side refrigerant sent to the heat source unit 2 is sent to the supercooler 27 through the liquid side shut-off valve 29.
  • the heat source side refrigerant sent to the subcooler 27 is sent to the heat source side expansion valve 25 without performing heat exchange because the heat source side refrigerant does not flow through the suction return pipe 26.
  • the heat source side refrigerant sent to the heat source side expansion valve 25 is depressurized by the heat source side expansion valve 25 to be in a low-pressure gas-liquid two-phase state, and sent to the heat source side heat exchanger 24 through the heat source side liquid refrigerant tube 24a. It is done.
  • the low-pressure refrigerant sent to the heat source side heat exchanger 24 evaporates by exchanging heat with outdoor air supplied by the heat source side fan 32 in the heat source side heat exchanger 24.
  • the low-pressure heat source side refrigerant evaporated in the heat source side heat exchanger 24 is sent to the heat source side accumulator 28 through the first heat source side gas refrigerant tube 23a and the heat source side switching mechanism 23.
  • the low-pressure heat source side refrigerant sent to the heat source side accumulator 28 is again sucked into the heat source side compressor 21 through the heat source side suction pipe 21c.
  • the low-pressure usage-side refrigerant in the refrigeration cycle circulating in the usage-side refrigerant circuit 40a is heated and evaporated by the heat radiation of the heat source-side refrigerant in the first usage-side heat exchanger 41a.
  • the low-pressure usage-side refrigerant evaporated in the first usage-side heat exchanger 41a is sent to the usage-side accumulator 67a through the second cascade-side gas refrigerant tube 69a.
  • the low-pressure use-side refrigerant sent to the use-side accumulator 67a is sucked into the use-side compressor 62a through the cascade-side suction pipe 71a, compressed to a high pressure in the refrigeration cycle, and then discharged to the cascade-side discharge pipe 70a.
  • the high-pressure use-side refrigerant discharged to the cascade-side discharge pipe 70a is sent to the refrigerant-water heat exchanger 65a through the first cascade-side gas refrigerant pipe 72a.
  • the high-pressure use-side refrigerant sent to the refrigerant-water heat exchanger 65a radiates heat by exchanging heat with the aqueous medium circulating in the aqueous medium circuit 80a by the circulation pump 43a in the refrigerant-water heat exchanger 65a.
  • the high-pressure use-side refrigerant that has radiated heat in the refrigerant-water heat exchanger 65a is decompressed in the refrigerant-water heat exchange side flow rate control valve 66a to become a low-pressure gas-liquid two-phase state, and passes through the cascade-side liquid refrigerant pipe 68a. Again, it is sent to the 1st utilization side heat exchanger 41a.
  • the aqueous medium circulating in the aqueous medium circuit 80a is heated by the heat radiation of the use-side refrigerant in the refrigerant-water heat exchanger 65a.
  • the aqueous medium heated in the refrigerant-water heat exchanger 65a is drawn into the circulation pump 43a through the first usage-side water outlet pipe 48a, and after being pressurized, is sent from the first usage unit 4a to the aqueous medium communication pipe 16a. It is done.
  • the aqueous medium sent to the hot water storage unit 8a exchanges heat with the aqueous medium in the hot water storage tank 81a in the heat exchange coil 82a to radiate heat, thereby heating the aqueous medium in the hot water storage tank 81a.
  • the aqueous medium sent to the hot water heating unit 9a dissipates heat in the heat exchange panel 91a, thereby heating the indoor wall or the like or heating the indoor floor. In this way, the hot water supply operation of the first usage unit 4a and the heating operation of the second usage unit 10a and / or the second usage unit 10b are performed.
  • the hot water supply operation and the heating operation cannot be performed without switching the temperature control mode to the heat source side heat radiation operation state. If the temperature control mode is switched to the heat source side evaporation operation state, the cooling operation cannot be performed. That is, in order to perform a desired operation in the first usage unit 4a and the second usage unit 10a, 10b, a hot water supply operation command from the first usage side controller 77a to the first usage unit 4a or a second usage side controller 108a.
  • the heat pump system 200 has the first usage unit 4a and the second usage unit 10a, 10b individually supplied with hot water, cooling or heating. You can not drive by selecting driving.
  • this heat pump system 200 like the heat pump system 1 of the first embodiment, one of the second usage-side controllers 108a, 108b that commands the second usage units 10a, 10b (here, the first Temperature control mode switching control that can be operated by switching to a temperature control mode different from the switching state of the heat source side switching mechanism 23 as the temperature control mode commanded by the 2 use side controller 108a). ing. Since the temperature control mode switching control is the same as the temperature control mode switching control in the heat pump system 1 of the first embodiment (see FIG. 2 and the like), description thereof is omitted here. Thereby, also in this heat pump system 200, the effect similar to the heat pump system 1 of 1st Embodiment can be acquired.
  • the first Temperature control mode switching control that can be operated by switching to a temperature control mode different from the switching state of the heat source side switching mechanism 23 as the temperature control mode commanded by the 2 use side controller 108a.
  • the hot water supply operation of the first usage unit 4a cannot be performed and the cooling operation of the second usage units 10a and 10b cannot be performed. If it can be performed (hereinafter referred to as “exhaust heat hot water supply operation”), the evaporative load (that is, the cooling load) in the second usage-side heat exchangers 101a and 101b in the operation state in which the cooling operation is performed such as summer. ),
  • the hot water supply operation can be performed by the heat radiation load (that is, the hot water supply load) in the first usage-side heat exchanger 4a, which is preferable from the viewpoint of energy saving.
  • FIG. 4 is a schematic configuration diagram of a heat pump system 300 according to the third embodiment of the present invention.
  • the heat pump system 300 is an apparatus capable of performing an operation for heating an aqueous medium using a vapor compression heat pump cycle.
  • the heat pump system 300 mainly includes a heat source unit 2, a first usage unit 4a, second usage units 10a and 10b, a discharge refrigerant communication tube 12, a liquid refrigerant communication tube 13, a gas refrigerant communication tube 14, and hot water storage.
  • the unit 8a, the hot water heating unit 9a, the aqueous medium communication pipe 15a, and the aqueous medium communication pipe 16a are provided, and the heat source unit 2, the first usage unit 4a, and the second usage unit 10a are connected to the refrigerant communication pipe 12, 13 and 14 constitutes the heat source side refrigerant circuit 20, the first usage unit 4a constitutes the usage side refrigerant circuit 40a, the first usage unit 4a, the hot water storage unit 8a, and the hot water heating unit 9a.
  • the aqueous medium communication pipes 15a and 16a to constitute an aqueous medium circuit 80a.
  • HFC-410A which is a kind of HFC refrigerant
  • HFC-134a which is a kind of HFC refrigerant
  • HFC-134a is sealed in the use side refrigerant circuit 40a as a use side refrigerant, and ester or ether type refrigerating machine oil having compatibility with the HFC refrigerant. Is enclosed for lubrication of the use side compressor 62a.
  • the pressure corresponding to saturation gas temperature 65 degreeC is 2.8 Mpa or less at a gauge pressure at most, Preferably, it is 2.0 Mpa
  • the following refrigerants are preferably used.
  • HFC-134a is a kind of refrigerant having such saturation pressure characteristics.
  • water as an aqueous medium circulates in the aqueous medium circuit 80a.
  • the second usage units 10a and 10b, the hot water storage unit 8a, the hot water heating unit 9a, and the liquid refrigerant communication tube 13 having the same configuration as the heat pump system 1 (see FIG. 1) in the first embodiment.
  • the configuration of the gas refrigerant communication pipe 14, the aqueous medium communication pipes 15a and 16a, the first usage-side controller 77a, and the second usage-side controllers 108a and 108b will be given the same reference numerals, and the description thereof will be omitted. 2, only the configuration of the discharge refrigerant communication tube 12 and the first usage unit 4a will be described.
  • the heat source unit 2 is installed outdoors and is connected to the utilization units 4 a and 10 a via the refrigerant communication pipes 12, 13 and 14 and constitutes a part of the heat source side refrigerant circuit 20.
  • the heat source unit 2 mainly includes a heat source side compressor 21, an oil separation mechanism 22, a heat source side switching mechanism 23, a heat source side heat exchanger 24, a heat source side expansion mechanism 25, a suction return pipe 26, and a supercooling.
  • the discharge side shut-off valve 31 is formed between the heat source side discharge branch pipe 21d branched from the heat source side discharge pipe 21b connecting the discharge of the heat source side compressor 21 and the heat source side switching mechanism 23 and the gas refrigerant communication pipe 14. It is the valve provided in the connection part.
  • the heat source unit 2 is the same as the heat pump system 1 (see FIG. 1) in the first embodiment except for the configuration except that the heat source unit 2 has the discharge side shut-off valve 31 and the heat source side discharge branch pipe 21d.
  • the same reference numerals are given and the description is omitted.
  • the discharge refrigerant communication pipe 12 is connected to the heat source side discharge branch pipe 21d via the discharge side closing valve 31, and the heat source side switching mechanism 23 is on the heat source side in both the heat source side heat radiation operation state and the heat source side evaporation operation state.
  • This is a refrigerant pipe capable of leading the heat source side refrigerant out of the heat source unit 2 from the discharge of the compressor 21.
  • the first usage unit 4a is installed indoors, is connected to the heat source unit 2 and the second usage unit 10a via the refrigerant communication pipes 12 and 13, and constitutes a part of the heat source side refrigerant circuit 20. Yes. Moreover, the 1st utilization unit 4a is connected to the hot water storage unit 8a and the hot water heating unit 9a via the aqueous medium communication pipes 15a and 16a, and comprises a part of aqueous medium circuit 80a.
  • the first usage unit 4a mainly includes a first usage-side heat exchanger 41a, a first usage-side flow rate adjustment valve 42a, and a circulation pump 43a.
  • the first use side heat exchanger 41a is connected to the gas refrigerant communication tube 14 like the heat pump system 1 (see FIG. 1) in the first embodiment on the gas side of the flow path through which the heat source side refrigerant flows.
  • a first use side discharge refrigerant pipe 46a to which the discharge refrigerant communication pipe 12 is connected is connected.
  • the first use side discharge refrigerant pipe 46a allows the flow of the heat source side refrigerant from the discharge refrigerant communication pipe 12 toward the first use side heat exchanger 41a, and is discharged from the first use side heat exchanger 41a to the discharge refrigerant communication pipe 12.
  • a first usage-side discharge check valve 49a that prohibits the flow of the heat source side refrigerant toward the first side is provided.
  • the usage unit 4a has a configuration excluding the point where the first usage-side discharge refrigerant pipe 46a is connected instead of the first usage-side gas refrigerant pipe 54a. 1), the same reference numerals are given here, and description thereof is omitted. Further, the heat pump system 300 is provided with a control unit (not shown) that performs the following operations and various controls according to the settings and commands of the first and second usage-side controllers. ⁇ Operation> Next, the operation of the heat pump system 300 will be described.
  • the operation of the heat pump system 300 includes a hot water supply operation in which only the hot water supply operation of the first usage unit 4a (that is, the operation of the hot water storage unit 8a and / or the hot water heating unit 9a), the second usage unit 10a and / or the second usage.
  • the switching state of the heat source side switching mechanism 23 as the temperature control mode is switched to the heat source side evaporation operation state by one of the second usage side controllers 108a and 108b, and then the first usage side controller 77a.
  • the operation (hot water supply operation) of the first usage unit 4a (and the hot water storage unit 8a and / or the hot water heating unit 9a) is performed according to the operation command.
  • the low pressure heat source side refrigerant in the refrigeration cycle is sucked into the heat source side compressor 21 through the heat source side suction pipe 21c and compressed to a high pressure in the refrigeration cycle, and then the heat source side refrigerant circuit 20 is cooled. It is discharged to the discharge pipe 21b.
  • the high pressure heat source side refrigerant discharged to the heat source side discharge pipe 21b is separated from the refrigerating machine oil in the oil separator 22a.
  • the refrigerating machine oil separated from the heat source side refrigerant in the oil separator 22a is returned to the heat source side suction pipe 21c through the oil return pipe 22b.
  • the high-pressure heat-source-side refrigerant from which the refrigeration oil has been separated is sent from the heat-source unit 2 to the discharge refrigerant communication tube 12 through the heat-source-side discharge branch pipe 21d and the discharge-side shut-off valve 31.
  • the high-pressure heat source side refrigerant sent to the discharge refrigerant communication tube 12 is sent to the first usage unit 4a.
  • the high-pressure heat-source-side refrigerant sent to the first usage unit 4a is sent to the first usage-side heat exchanger 41a through the first usage-side discharge refrigerant tube 46a and the first usage-side discharge check valve 49a.
  • the high-pressure heat-source-side refrigerant sent to the first usage-side heat exchanger 41a radiates heat by exchanging heat with the aqueous medium circulating in the aqueous-medium circuit 80a by the circulation pump 43a in the first usage-side heat exchanger 41a.
  • the high-pressure heat-source-side refrigerant radiated in the first usage-side heat exchanger 41a is sent from the first usage unit 4a to the liquid refrigerant communication tube 13 through the first usage-side flow rate adjustment valve 42a and the first usage-side liquid refrigerant tube 45a. It is done.
  • the heat source side refrigerant sent to the liquid refrigerant communication tube 13 is sent to the heat source unit 2.
  • the heat source side refrigerant sent to the heat source unit 2 is sent to the supercooler 27 through the liquid side shut-off valve 29.
  • the heat source side refrigerant sent to the subcooler 27 is sent to the heat source side expansion valve 25 without performing heat exchange because the heat source side refrigerant does not flow through the suction return pipe 26.
  • the heat source side refrigerant sent to the heat source side expansion valve 25 is depressurized by the heat source side expansion valve 25 to be in a low-pressure gas-liquid two-phase state, and sent to the heat source side heat exchanger 24 through the heat source side liquid refrigerant tube 24a. It is done.
  • the low-pressure refrigerant sent to the heat source side heat exchanger 24 evaporates by exchanging heat with outdoor air supplied by the heat source side fan 32 in the heat source side heat exchanger 24.
  • the low-pressure heat source side refrigerant evaporated in the heat source side heat exchanger 24 is sent to the heat source side accumulator 28 through the first heat source side gas refrigerant tube 23a and the heat source side switching mechanism 23.
  • the low-pressure heat source side refrigerant sent to the heat source side accumulator 28 is again sucked into the heat source side compressor 21 through the heat source side suction pipe 21c.
  • the aqueous medium circulating in the aqueous medium circuit 80a is heated by the heat radiation of the heat source side refrigerant in the first usage-side heat exchanger 41a.
  • the aqueous medium heated in the first usage-side heat exchanger 41a is sucked into the circulation pump 43a through the first usage-side water outlet pipe 48a, and after the pressure is increased, from the first usage unit 4a to the aqueous medium communication pipe 16a.
  • the aqueous medium sent to the aqueous medium communication pipe 16a is sent to the hot water storage unit 8a and / or the hot water heating unit 9a through the aqueous medium side switching mechanism 161a.
  • the aqueous medium sent to the hot water storage unit 8a exchanges heat with the aqueous medium in the hot water storage tank 81a in the heat exchange coil 82a to radiate heat, thereby heating the aqueous medium in the hot water storage tank 81a.
  • the aqueous medium sent to the hot water heating unit 9a dissipates heat in the heat exchange panel 91a, thereby heating the indoor wall or the like or heating the indoor floor.
  • movement in the hot water supply operation which performs only the hot water supply operation of the 1st utilization unit 4a is performed.
  • -Cooling operation When only the cooling operation of the second usage unit 10a and / or the second usage unit 10b is performed, in the heat source side refrigerant circuit 20, the heat source side switching mechanism 23 is in the heat source side heat radiation operation state (the heat source side switching mechanism in FIG. 4). 23, the first use side flow rate adjustment valve 42a is closed.
  • the second usage side controller 108a and The operation (cooling operation) of the second usage unit 10a and / or the second usage unit 10b is performed according to the operation command of the second usage side controller 108b. Since the cooling operation is the same as the cooling operation in the heat pump system 1 of the first embodiment, the description thereof is omitted here.
  • the second usage side controller 108a and The operation (heating operation) of the second usage unit 10a and / or the second usage unit 10b is performed according to the operation command of the second usage side controller 108b. Since the heating operation is the same as the heating operation in the heat pump system 1 of the first embodiment, the description thereof is omitted here.
  • the heat source side switching mechanism 23 is heat source side evaporation.
  • the operation state is switched to the operation state (the state indicated by the broken line of the heat source side switching mechanism 23 in FIG. 4), and the suction return expansion valve 26a is closed.
  • the aqueous medium circuit 80a the aqueous medium switching mechanism 161a is switched to a state in which the aqueous medium is supplied to the hot water storage unit 8a and / or the hot water heating unit 9a.
  • the switching state of the heat source side switching mechanism 23 as the temperature control mode is switched to the heat source side evaporation operation state by one of the second usage side controllers 108a and 108b, and then the first usage side controller 77a.
  • the operation command the operation (hot water supply operation) of the first usage unit 4a (and the hot water storage unit 8a and / or the hot water heating unit 9a) and the operation command of the second usage side controller 108a and / or the second usage side controller 108b
  • the operation (heating operation) of the second usage unit 10a and / or the second usage unit 10b is performed.
  • the low pressure heat source side refrigerant in the refrigeration cycle is sucked into the heat source side compressor 21 through the heat source side suction pipe 21c and compressed to a high pressure in the refrigeration cycle, and then the heat source side refrigerant circuit 20 is cooled. It is discharged to the discharge pipe 21b.
  • the high pressure heat source side refrigerant discharged to the heat source side discharge pipe 21b is separated from the refrigerating machine oil in the oil separator 22a.
  • the refrigerating machine oil separated from the heat source side refrigerant in the oil separator 22a is returned to the heat source side suction pipe 21c through the oil return pipe 22b.
  • a part of the high-pressure heat source side refrigerant from which the refrigerating machine oil has been separated is sent from the heat source unit 2 to the discharge refrigerant communication pipe 12 through the heat source side discharge branch pipe 21d and the discharge side shut-off valve 31, and the rest is used as the heat source. It is sent from the heat source unit 2 to the gas refrigerant communication pipe 14 through the side switching mechanism 23, the second heat source side gas refrigerant pipe 23 b, and the gas side closing valve 30.
  • the high-pressure heat-source-side refrigerant sent to the gas refrigerant communication tube 14 is sent to the second usage units 10a and 10b (here, it is assumed that both the second usage units 10a and 10b are operated for heating).
  • the high-pressure heat-source-side refrigerant sent to the second usage units 10a, 10b is sent to the second usage-side heat exchangers 101a, 101b through the second usage-side gas refrigerant tubes 104a, 104b.
  • the high-pressure heat-source-side refrigerant sent to the second usage-side heat exchangers 101a and 101b exchanges heat with the air medium supplied by the usage-side fans 105a and 105b in the second usage-side heat exchangers 101a and 101b. To dissipate heat, thereby heating the room.
  • the high-pressure heat-source-side refrigerant radiated in the second usage-side heat exchangers 101a and 101b passes through the second usage-side flow rate adjustment valves 102a and 102b and the second usage-side liquid refrigerant tubes 103a and 103b, and the second usage units 10a and 10b.
  • the high-pressure heat source side refrigerant sent to the discharge refrigerant communication tube 12 is sent to the first usage unit 4a.
  • the high-pressure heat-source-side refrigerant sent to the first usage unit 4a is sent to the first usage-side heat exchanger 41a through the first usage-side discharge refrigerant tube 46a and the first usage-side discharge check valve 49a.
  • the high-pressure heat-source-side refrigerant sent to the first usage-side heat exchanger 41a radiates heat by exchanging heat with the aqueous medium circulating in the aqueous-medium circuit 80a by the circulation pump 43a in the first usage-side heat exchanger 41a. .
  • the high-pressure heat-source-side refrigerant radiated in the first usage-side heat exchanger 41a is sent from the first usage unit 4a to the liquid refrigerant communication tube 13 through the first usage-side flow rate adjustment valve 42a and the first usage-side liquid refrigerant tube 45a. It is done.
  • the heat source side refrigerant sent from the second usage units 10a and 10b and the first usage unit 4a to the liquid refrigerant communication tube 13 merges in the liquid refrigerant communication tube 13 and is sent to the heat source unit 2.
  • the heat source side refrigerant sent to the heat source unit 2 is sent to the supercooler 27 through the liquid side closing valve 29.
  • the heat source side refrigerant sent to the subcooler 27 is sent to the heat source side expansion valve 25 without performing heat exchange because the heat source side refrigerant does not flow through the suction return pipe 26.
  • the heat source side refrigerant sent to the heat source side expansion valve 25 is depressurized by the heat source side expansion valve 25 to be in a low-pressure gas-liquid two-phase state, and sent to the heat source side heat exchanger 24 through the heat source side liquid refrigerant tube 24a. It is done.
  • the low-pressure refrigerant sent to the heat source side heat exchanger 24 evaporates by exchanging heat with outdoor air supplied by the heat source side fan 32 in the heat source side heat exchanger 24.
  • the low-pressure heat source side refrigerant evaporated in the heat source side heat exchanger 24 is sent to the heat source side accumulator 28 through the first heat source side gas refrigerant tube 23a and the heat source side switching mechanism 23.
  • the low-pressure heat source side refrigerant sent to the heat source side accumulator 28 is again sucked into the heat source side compressor 21 through the heat source side suction pipe 21c.
  • the aqueous medium circulating in the aqueous medium circuit 80a is heated by the heat radiation of the heat source side refrigerant in the first usage-side heat exchanger 41a.
  • the aqueous medium heated in the first usage-side heat exchanger 41a is sucked into the circulation pump 43a through the first usage-side water outlet pipe 48a, and after the pressure is increased, from the first usage unit 4a to the aqueous medium communication pipe 16a.
  • the aqueous medium sent to the aqueous medium communication pipe 16a is sent to the hot water storage unit 8a and / or the hot water heating unit 9a through the aqueous medium side switching mechanism 161a.
  • the aqueous medium sent to the hot water storage unit 8a exchanges heat with the aqueous medium in the hot water storage tank 81a in the heat exchange coil 82a to radiate heat, thereby heating the aqueous medium in the hot water storage tank 81a.
  • the aqueous medium sent to the hot water heating unit 9a dissipates heat in the heat exchange panel 91a, thereby heating the indoor wall or the like or heating the indoor floor.
  • the hot water supply operation of the first usage unit 4a and the heating operation of the second usage unit 10a and / or the second usage unit 10b are performed.
  • -Waste heat hot water operation In the case of performing the exhaust heat hot water supply operation for performing the hot water supply operation of the first usage unit 4a and the cooling operation of the second usage unit 10a and / or the second usage unit 10b, the heat source side refrigerant circuit 20 performs heat source side switching.
  • the mechanism 23 is switched to the heat source side heat radiation operation state (the state indicated by the solid line of the heat source side switching mechanism 23 in FIG. 4).
  • the aqueous medium switching mechanism 161a is switched to a state of supplying the aqueous medium to the hot water storage unit 8a.
  • the switching state of the heat source side switching mechanism 23 as the temperature control mode is switched to the heat source side evaporation operation state by one of the second usage side controllers 108a and 108b, and then the first usage side controller 77a.
  • the second usage unit 10a and / or the second usage unit 10b is operated (cooling operation).
  • the low pressure heat source side refrigerant in the refrigeration cycle is sucked into the heat source side compressor 21 through the heat source side suction pipe 21c and compressed to a high pressure in the refrigeration cycle, and then the heat source side refrigerant circuit 20 is cooled. It is discharged to the discharge pipe 21b.
  • the high pressure heat source side refrigerant discharged to the heat source side discharge pipe 21b is separated from the refrigerating machine oil in the oil separator 22a.
  • the refrigerating machine oil separated from the heat source side refrigerant in the oil separator 22a is returned to the heat source side suction pipe 21c through the oil return pipe 22b.
  • a part of the high-pressure heat source side refrigerant from which the refrigerating machine oil is separated is sent from the heat source unit 2 to the discharge refrigerant communication pipe 12 through the heat source side discharge branch pipe 21d and the discharge side shut-off valve 31, and the rest is used as the heat source. It is sent to the heat source side heat exchanger 24 through the side switching mechanism 23 and the first heat source side gas refrigerant tube 23a.
  • the high-pressure heat-source-side refrigerant sent to the heat-source-side heat exchanger 24 radiates heat by exchanging heat with outdoor air supplied by the heat-source-side fan 32 in the heat source-side heat exchanger 24.
  • the high-pressure heat-source-side refrigerant that has radiated heat in the heat-source-side heat exchanger is sent to the supercooler 27 through the heat source-side expansion valve 25.
  • the heat-source-side refrigerant sent to the subcooler 27 is cooled so as to be in a supercooled state by exchanging heat with the heat-source-side refrigerant branched from the heat source-side liquid refrigerant tube 24a to the suction return tube 26.
  • the heat source side refrigerant flowing through the suction return pipe 26 is returned to the heat source side suction pipe 21c.
  • the heat source side refrigerant cooled in the subcooler 27 is sent from the heat source unit 2 to the liquid refrigerant communication tube 13 through the heat source side liquid refrigerant tube 24a and the liquid side shut-off valve 29.
  • the high-pressure heat source side refrigerant sent to the discharge refrigerant communication tube 12 is sent to the first usage unit 4a.
  • the high-pressure heat-source-side refrigerant sent to the first usage unit 4a is sent to the first usage-side heat exchanger 41a through the first usage-side discharge refrigerant tube 46a and the first usage-side discharge check valve 49a.
  • the high-pressure heat-source-side refrigerant sent to the first usage-side heat exchanger 41a radiates heat by exchanging heat with the aqueous medium circulating in the aqueous-medium circuit 80a by the circulation pump 43a in the first usage-side heat exchanger 41a. .
  • the high-pressure heat-source-side refrigerant radiated in the first usage-side heat exchanger 41a is sent from the first usage unit 4a to the liquid refrigerant communication tube 13 through the first usage-side flow rate adjustment valve 42a and the first usage-side liquid refrigerant tube 45a. It is done.
  • the heat-source-side refrigerant sent from the heat source unit 2 and the first usage unit 4a to the liquid refrigerant communication tube 13 merges in the liquid refrigerant communication tube 13, and the second usage units 10a and 10b (here, the second usage unit 10a). 10b will be described as heating operation).
  • the heat-source-side refrigerant sent to the second usage units 10a and 10b is sent to the second usage-side flow rate adjustment valves 102a and 102b.
  • the heat-source-side refrigerant sent to the second usage-side flow rate adjustment valves 102a, 102b is depressurized by the second usage-side flow rate adjustment valves 102a, 102b to be in a low-pressure gas-liquid two-phase state, and the second usage-side liquid refrigerant. It is sent to the second usage side heat exchangers 101a and 101b through the tubes 103a and 103b.
  • the low-pressure heat source side refrigerant sent to the second usage side heat exchangers 101a and 101b exchanges heat with the air medium supplied by the usage side fans 105a and 105a in the second usage side heat exchangers 101a and 101b. This evaporates and cools the room.
  • the low-pressure heat-source-side refrigerant evaporated in the second usage-side heat exchangers 101a and 101b is sent from the second usage units 10a and 10b to the gas refrigerant communication tube 14 through the second usage-side gas refrigerant tubes 104a and 104b.
  • the low-pressure heat source side refrigerant sent to the gas refrigerant communication tube 14 is sent to the heat source unit 2.
  • the low-pressure heat source side refrigerant sent to the heat source unit 2 is sent to the heat source side accumulator 28 through the gas side shut-off valve 30, the second heat source side gas refrigerant tube 23b, and the heat source side switching mechanism 23.
  • the low-pressure heat source side refrigerant sent to the heat source side accumulator 28 is again sucked into the heat source side compressor 21 through the heat source side suction pipe 21c.
  • the aqueous medium circulating in the aqueous medium circuit 80a is heated by the heat radiation of the heat source side refrigerant in the first usage-side heat exchanger 41a.
  • the aqueous medium heated in the first usage-side heat exchanger 41a is drawn into the circulation pump 43a through the first usage-side water outlet pipe 48a, and after the pressure is increased, the first usage unit 4a supplies the aqueous medium communication pipe 16a.
  • the aqueous medium sent to the aqueous medium communication pipe 16a is sent to the hot water storage unit 8a and / or the hot water heating unit 9a through the aqueous medium side switching mechanism 161a.
  • the aqueous medium sent to the hot water storage unit 8a exchanges heat with the aqueous medium in the hot water storage tank 81a in the heat exchange coil 82a to radiate heat, thereby heating the aqueous medium in the hot water storage tank 81a.
  • the hot water supply operation in which the hot water supply operation of the first usage unit 4a is performed and the cooling operation of the second usage unit 10a and / or the second usage unit 10b is performed.
  • the hot water supply operation can be performed while the temperature control mode is switched to the heat source side heat radiation operation state. Is performed, the hot water supply operation is performed by the heat radiation load in the first usage-side heat exchanger 41a corresponding to the evaporation load in the second usage-side heat exchangers 101a and 101b. In this case, it is necessary to switch the temperature control mode to the heat source side evaporation operation state and perform the hot water supply operation.
  • the temperature control mode In spring and autumn, cooling operation and heating operation may be performed as necessary. In this case, the temperature control mode must be switched. That is, even in a configuration capable of performing the exhaust heat hot water supply operation, such as the heat pump system 300, the temperature control mode needs to be switched. In this sense, the heat pump system 300 is also the first usage unit. 4a and the second usage units 10a and 10b cannot be operated by individually selecting a hot water supply operation, a cooling operation or a heating operation.
  • the temperature control mode is in the heat source side heat radiation operation state (that is, even if the second usage units 10a and 10b are in the cooling operation or not in the cooling operation, the second usage
  • the side controller 108a commands the temperature control mode to enter the heat source side heat radiation operation state
  • the hot water supply operation is commanded from the first usage side controller 77a to the first usage unit 4a (therefore, temperature regulation)
  • the priority hot water supply operation steps S17 to S19
  • the commanded temperature adjustment mode here, the second usage side controller 108a) Operation in the temperature control mode
  • step S11, S14 is to be carried out.
  • step S12 it is determined whether or not the condition A is satisfied.
  • this state is referred to as “tm3 time-up”), and whether or not a hot water supply operation has been commanded to the first usage unit 4a by the first usage-side controller 77a (FIG. 5).
  • the time tm3 is a time set in step S20 described later.
  • the exhaust heat hot water supply operation when the cooling operation is performed, when the hot water storage temperature Twh of the hot water storage unit 8a becomes equal to or lower than a predetermined hot water storage set temperature Twhs, the first usage unit 4a automatically becomes the first use unit 4a.
  • the temperature control mode is on the heat source side.
  • the hot water storage temperature Twh Since that is the state that can not) be above a predetermined hot-water storage temperature setting Twhs, towards the priority hot-water supply operation (steps S17 ⁇ S19), the process proceeds to step S13 and subsequent steps.
  • Step S13 although the condition A is satisfied, the process does not immediately shift to the preferential hot water supply operation (Steps S17 to S19), but in Step S13, the predetermined first time tm1 is counted.
  • the first time tm1 corresponds to a time interval from the end of the process of step S12 to the process of steps S15 and S16, and is set to about several minutes to 10 minutes.
  • step S15 it is determined whether or not the condition B is satisfied.
  • the low temperature condition temperature Tol corresponds to the highest temperature assumed to perform the heating operation of the second usage units 10a and 10b, and is set to about 15 ° C.
  • step S15 when it is determined that the condition B is not satisfied, that is, when the temperature control mode is the heat source side evaporation operation state (that is, “temperature control mode ⁇ cooling”), or the first usage side
  • the exhaust heat hot water supply operation for performing the operation is performed (in FIG.
  • step S17 counting of a predetermined second time tm2 is started.
  • the second time tm2 corresponds to the time for performing the priority hot water supply operation, and is set to about 10 to 30 minutes.
  • the circulation pump 43a is started and the first usage-side flow rate adjustment valve 41a is opened to start the hot water supply operation (that is, priority hot water supply operation) of the first usage unit 4a.
  • the second usage units 10a and 10b are switched to a state in which heating operation is performed.
  • the second usage units 10a and 10b are performing the cooling operation until the priority hot water supply operation is started, the second usage units 10a and 10b are in a state of performing the heating operation, and the priority hot water supply operation is being performed.
  • the heating operation is started when the second usage-side controllers 108a and 108b are instructed to the second usage units 10a and 10b, the indoor comfort is impaired, which is not preferable. Therefore, in the heat pump system 300, as in the heat pump system 1 of the first embodiment, the cooling operation of the second usage units 10a and 10b is prohibited during the priority hot water supply operation.
  • the second usage unit 10a to which the cooling operation is instructed from the second usage-side controllers 108a and 108b If the operation of the use side fans 105a and 105b is also stopped for 10b, the user may misunderstand that the failure of the second use units 10a and 10b has occurred.
  • the second usage units 10a and 10b for which the cooling operation is instructed from the second usage-side controllers 108a and 108b are in the priority hot water supply operation.
  • the operating frequency of the use side fans 105a and 105b is preferably set to the lowest frequency in order to prevent indoor drafts.
  • the operating state of the second usage units 10a and 10b in the second usage-side controllers 108a and 108b in conjunction with stopping the cooling operation of the second usage units 10a and 10b, the operating state of the second usage units 10a and 10b in the second usage-side controllers 108a and 108b. If the display is changed (that is, the cooling operation is changed to stop), the user may misunderstand that the failure of the second usage units 10a and 10b has occurred. Therefore, in the heat pump system 300, as in the heat pump system 1 of the first embodiment, the second usage-side controllers 108a and 108b are operated even when the cooling operation of the second usage units 10a and 10b in the priority hot water supply operation is stopped. An indication that the vehicle is in operation is maintained.
  • step S19 the priority hot-water supply driving
  • the high temperature condition temperature Toh corresponds to the lowest temperature at which the cooling operation of the second usage units 10a and 10b is assumed, and is set to about 20 ° C. Then, the priority hot water supply operation is in a state in which it is determined in step S19 that the condition C is satisfied, that is, the hot water supply operation can be performed without performing the priority hot water supply operation, or the hot water supply operation becomes unnecessary.
  • the priority hot water supply operation is continued until the second time tm2 is continued, and thereafter, the process shifts to the process (steps S20 and S11) for returning to the operation in the temperature control mode commanded by the second usage-side controller 108a.
  • step S20 counting of a predetermined third time tm3 is started, and in step S11, the operation in the temperature control mode commanded by the second usage-side controller 108a is started. Processing to return is performed.
  • the third time tm3 corresponds to the time during which the operation in the temperature control mode commanded by the second use side controller 108a is performed without performing the priority hot water supply operation when the priority hot water supply operation is requested. It is set to about 5 to 25 minutes.
  • the priority hot water supply operation is performed for the second time tm2, and the cooling operation is performed for the third time tm3. Will be done.
  • the operation of the second usage units 10a and 10b is stopped or the cooling operation is being performed by the temperature control mode switching control as described above (that is, the second usage side).
  • the temperature control mode commanded by the controller 108a is the heat source side heat radiation operation state
  • the hot water supply operation is requested from the first usage unit 10a (that is, from the first usage side controller 77a to the first usage unit 4a
  • the second use-side controller 108a commands the temperature control mode to the heat source side heat radiation operation state
  • the temperature control mode is switched to the heat source side evaporation operation state.
  • the priority hot water supply operation can be performed, that is, the heat source side as the temperature control mode commanded by the second usage side controller 108a It becomes possible to operate by switching to a different temperature control mode the switching state of the changeover mechanism 23.
  • the hot water supply operation of the first usage unit 4a cannot be performed and the cooling operation of the second usage units 10a and 10b cannot be performed. If it can be performed (hereinafter referred to as “exhaust heat hot water supply operation”), the evaporation load (that is, the cooling load) in the second usage-side heat exchangers 101a and 101b in the operation state in which the cooling operation is performed in summer or the like. ), The hot water supply operation can be performed by the heat radiation load (that is, the hot water supply load) in the first usage-side heat exchanger 4a, which is preferable from the viewpoint of energy saving.
  • FIG. 6 is a schematic configuration diagram of a heat pump system 400 according to the fourth embodiment of the present invention.
  • the heat pump system 400 is an apparatus capable of performing an operation for heating an aqueous medium using a vapor compression heat pump cycle.
  • the heat pump system 400 mainly includes a heat source unit 2, a first usage unit 4a, second usage units 10a and 10b, a discharge refrigerant communication tube 12, a liquid refrigerant communication tube 13, a gas refrigerant communication tube 14, and hot water storage.
  • the unit 8a, the hot water heating unit 9a, the aqueous medium communication pipe 15a, and the aqueous medium communication pipe 16a are provided, and the heat source unit 2, the first usage unit 4a, and the second usage unit 10a are connected to the refrigerant communication pipe 12, 13 and 14 constitutes the heat source side refrigerant circuit 20, the first usage unit 4a constitutes the usage side refrigerant circuit 40a, the first usage unit 4a, the hot water storage unit 8a, and the hot water heating unit 9a.
  • the aqueous medium communication pipes 15a and 16a to constitute an aqueous medium circuit 80a.
  • HFC-410A which is a kind of HFC refrigerant
  • HFC-134a which is a kind of HFC refrigerant
  • HFC-134a is sealed in the use side refrigerant circuit 40a as a use side refrigerant, and ester or ether type refrigerating machine oil having compatibility with the HFC refrigerant. Is enclosed for lubrication of the use side compressor 62a.
  • the pressure corresponding to saturation gas temperature 65 degreeC is 2.8 Mpa or less at a gauge pressure at most, Preferably, it is 2.0 Mpa
  • the following refrigerants are preferably used.
  • HFC-134a is a kind of refrigerant having such saturation pressure characteristics.
  • water as an aqueous medium circulates in the aqueous medium circuit 80a.
  • the configuration of the heat pump system 400 includes the second usage units 10a and 10b, the hot water storage unit 8a, the hot water heating unit 9a, the liquid refrigerant communication tube 13, the gas refrigerant communication tube 14, the aqueous medium communication tubes 15a and 16a, and the first usage.
  • the configurations of the side controller 77a and the second usage side controllers 108a and 108b are the same as those of the heat pump system 200 (see FIG. 3) in the second embodiment, and the heat source unit 2 and the discharge refrigerant communication pipe 12 are the same. Since the configuration is the same as the configuration of the heat pump system 300 (see FIG.
  • the first usage unit 4a is installed indoors, is connected to the heat source unit 2 and the second usage unit 10a via the refrigerant communication pipes 12 and 13, and constitutes a part of the heat source side refrigerant circuit 20. Yes.
  • the 1st utilization unit 4a comprises the utilization side refrigerant circuit 40a.
  • the 1st utilization unit 4a is connected to the hot water storage unit 8a and the hot water heating unit 9a via the aqueous medium communication pipes 15a and 16a, and constitutes a part of the aqueous medium circuit 80a.
  • the first usage unit 4a mainly includes a first usage-side heat exchanger 41a, a first usage-side flow rate adjustment valve 42a, a usage-side compressor 62a, a refrigerant-water heat exchanger 65a, and a refrigerant-hydrothermal exchange. It has a side flow rate adjustment valve 66a, a use side accumulator 67a, and a circulation pump 43a.
  • the first use side heat exchanger 41a is connected to the gas refrigerant communication pipe 14 like the heat pump system 200 (see FIG. 3) in the second embodiment on the gas side of the flow path through which the heat source side refrigerant flows.
  • a first use side discharge refrigerant pipe 46a to which the discharge refrigerant communication pipe 12 is connected is connected.
  • the first use side discharge refrigerant pipe 46a allows the flow of the heat source side refrigerant from the discharge refrigerant communication pipe 12 toward the first use side heat exchanger 41a, and is discharged from the first use side heat exchanger 41a to the discharge refrigerant communication pipe 12.
  • a first usage-side discharge check valve 49a that prohibits the flow of the heat source side refrigerant toward the first side is provided.
  • the usage unit 4a has a configuration in which the first usage-side discharge refrigerant pipe 46a is connected in place of the first usage-side gas refrigerant pipe 54a except for the heat pump system 200 in the second embodiment (see FIG. 3), the same reference numerals are given here, and description thereof is omitted.
  • the heat pump system 400 is provided with a control unit (not shown) that performs the following operations and various controls according to the settings and commands of the first and second usage-side controllers. ⁇ Operation> Next, the operation of the heat pump system 400 will be described.
  • the operation of the heat pump system 400 includes a hot water supply operation in which only the hot water supply operation of the first usage unit 4a (that is, the operation of the hot water storage unit 8a and / or the hot water heating unit 9a), the second usage unit 10a and / or the second usage.
  • the switching state of the heat source side switching mechanism 23 as the temperature control mode is switched to the heat source side evaporation operation state by one of the second usage side controllers 108a and 108b, and then the first usage side controller 77a.
  • the operation (hot water supply operation) of the first usage unit 4a (and the hot water storage unit 8a and / or the hot water heating unit 9a) is performed according to the operation command.
  • the low pressure heat source side refrigerant in the refrigeration cycle is sucked into the heat source side compressor 21 through the heat source side suction pipe 21c and compressed to a high pressure in the refrigeration cycle, and then the heat source side refrigerant circuit 20 is cooled. It is discharged to the discharge pipe 21b.
  • the high pressure heat source side refrigerant discharged to the heat source side discharge pipe 21b is separated from the refrigerating machine oil in the oil separator 22a.
  • the refrigerating machine oil separated from the heat source side refrigerant in the oil separator 22a is returned to the heat source side suction pipe 21c through the oil return pipe 22b.
  • the high-pressure heat-source-side refrigerant from which the refrigeration oil has been separated is sent from the heat-source unit 2 to the discharge refrigerant communication tube 12 through the heat-source-side discharge branch pipe 21d and the discharge-side shut-off valve 31.
  • the high-pressure heat source side refrigerant sent to the discharge refrigerant communication tube 12 is sent to the first usage unit 4a.
  • the high-pressure heat-source-side refrigerant sent to the first usage unit 4a is sent to the first usage-side heat exchanger 41a through the first usage-side discharge refrigerant tube 46a and the first usage-side discharge check valve 49a.
  • the high-pressure heat-source-side refrigerant sent to the first usage-side heat exchanger 41a exchanges heat with the low-pressure usage-side refrigerant in the refrigeration cycle circulating in the usage-side refrigerant circuit 40a in the first usage-side heat exchanger 41a. To dissipate heat.
  • the high-pressure heat-source-side refrigerant radiated in the first usage-side heat exchanger 41a is sent from the first usage unit 4a to the liquid refrigerant communication tube 13 through the first usage-side flow rate adjustment valve 42a and the first usage-side liquid refrigerant tube 45a. It is done.
  • the heat source side refrigerant sent to the liquid refrigerant communication tube 13 is sent to the heat source unit 2.
  • the heat source side refrigerant sent to the heat source unit 2 is sent to the supercooler 27 through the liquid side shut-off valve 29.
  • the heat source side refrigerant sent to the subcooler 27 is sent to the heat source side expansion valve 25 without performing heat exchange because the heat source side refrigerant does not flow through the suction return pipe 26.
  • the heat source side refrigerant sent to the heat source side expansion valve 25 is depressurized by the heat source side expansion valve 25 to be in a low-pressure gas-liquid two-phase state, and sent to the heat source side heat exchanger 24 through the heat source side liquid refrigerant tube 24a. It is done.
  • the low-pressure refrigerant sent to the heat source side heat exchanger 24 evaporates by exchanging heat with outdoor air supplied by the heat source side fan 32 in the heat source side heat exchanger 24.
  • the low-pressure heat source side refrigerant evaporated in the heat source side heat exchanger 24 is sent to the heat source side accumulator 28 through the first heat source side gas refrigerant tube 23a and the heat source side switching mechanism 23.
  • the low-pressure heat source side refrigerant sent to the heat source side accumulator 28 is again sucked into the heat source side compressor 21 through the heat source side suction pipe 21c.
  • the low-pressure usage-side refrigerant in the refrigeration cycle circulating in the usage-side refrigerant circuit 40a is heated and evaporated by the heat radiation of the heat source-side refrigerant in the first usage-side heat exchanger 41a.
  • the low-pressure usage-side refrigerant evaporated in the first usage-side heat exchanger 41a is sent to the usage-side accumulator 67a through the second cascade-side gas refrigerant tube 69a.
  • the low-pressure use-side refrigerant sent to the use-side accumulator 67a is sucked into the use-side compressor 62a through the cascade-side suction pipe 71a, compressed to a high pressure in the refrigeration cycle, and then discharged to the cascade-side discharge pipe 70a.
  • the high-pressure use-side refrigerant discharged to the cascade-side discharge pipe 70a is sent to the refrigerant-water heat exchanger 65a through the first cascade-side gas refrigerant pipe 72a.
  • the high-pressure use-side refrigerant sent to the refrigerant-water heat exchanger 65a radiates heat by exchanging heat with the aqueous medium circulating in the aqueous medium circuit 80a by the circulation pump 43a in the refrigerant-water heat exchanger 65a.
  • the high-pressure use-side refrigerant that has radiated heat in the refrigerant-water heat exchanger 65a is decompressed in the refrigerant-water heat exchange side flow rate control valve 66a to become a low-pressure gas-liquid two-phase state, and passes through the cascade-side liquid refrigerant pipe 68a. Again, it is sent to the 1st utilization side heat exchanger 41a.
  • the aqueous medium circulating in the aqueous medium circuit 80a is heated by the heat radiation of the use-side refrigerant in the refrigerant-water heat exchanger 65a.
  • the aqueous medium heated in the refrigerant-water heat exchanger 65a is drawn into the circulation pump 43a through the first usage-side water outlet pipe 48a, and after being pressurized, is sent from the first usage unit 4a to the aqueous medium communication pipe 16a. It is done.
  • the aqueous medium sent to the hot water storage unit 8a exchanges heat with the aqueous medium in the hot water storage tank 81a in the heat exchange coil 82a to radiate heat, thereby heating the aqueous medium in the hot water storage tank 81a.
  • the aqueous medium sent to the hot water heating unit 9a dissipates heat in the heat exchange panel 91a, thereby heating the indoor wall or the like or heating the indoor floor.
  • the heat source side switching mechanism 23 is in the heat source side heat dissipation operation state (the heat source side switching mechanism in FIG. 6).
  • the first use side flow rate adjustment valve 42a is closed.
  • the second usage side controller 108a and The operation (cooling operation) of the second usage unit 10a and / or the second usage unit 10b is performed according to the operation command of the second usage side controller 108b. Since the cooling operation is the same as the cooling operation in the heat pump system 200 of the second embodiment, the description thereof is omitted here.
  • the second usage side controller 108a and The operation (heating operation) of the second usage unit 10a and / or the second usage unit 10b is performed according to the operation command of the second usage side controller 108b. Since the heating operation is the same as the heating operation in the heat pump system 200 of the second embodiment, the description thereof is omitted here.
  • the heat source side switching mechanism 23 is heat source side evaporation.
  • the operation state is switched to the operation state (the state indicated by the broken line of the heat source side switching mechanism 23 in FIG. 6), and the suction return expansion valve 26a is closed.
  • the aqueous medium circuit 80a the aqueous medium switching mechanism 161a is switched to a state in which the aqueous medium is supplied to the hot water storage unit 8a and / or the hot water heating unit 9a.
  • the switching state of the heat source side switching mechanism 23 as the temperature control mode is switched to the heat source side evaporation operation state by one of the second usage side controllers 108a and 108b, and then the first usage side controller 77a.
  • the operation command the operation (hot water supply operation) of the first usage unit 4a (and the hot water storage unit 8a and / or the hot water heating unit 9a) and the operation command of the second usage side controller 108a and / or the second usage side controller 108b
  • the operation (heating operation) of the second usage unit 10a and / or the second usage unit 10b is performed.
  • the low pressure heat source side refrigerant in the refrigeration cycle is sucked into the heat source side compressor 21 through the heat source side suction pipe 21c and compressed to a high pressure in the refrigeration cycle, and then the heat source side refrigerant circuit 20 is cooled. It is discharged to the discharge pipe 21b.
  • the high pressure heat source side refrigerant discharged to the heat source side discharge pipe 21b is separated from the refrigerating machine oil in the oil separator 22a.
  • the refrigerating machine oil separated from the heat source side refrigerant in the oil separator 22a is returned to the heat source side suction pipe 21c through the oil return pipe 22b.
  • a part of the high-pressure heat source side refrigerant from which the refrigerating machine oil has been separated is sent from the heat source unit 2 to the discharge refrigerant communication pipe 12 through the heat source side discharge branch pipe 21d and the discharge side shut-off valve 31, and the rest is used as the heat source. It is sent from the heat source unit 2 to the gas refrigerant communication pipe 14 through the side switching mechanism 23, the second heat source side gas refrigerant pipe 23 b, and the gas side closing valve 30.
  • the high-pressure heat-source-side refrigerant sent to the gas refrigerant communication tube 14 is sent to the second usage units 10a and 10b (here, it is assumed that both the second usage units 10a and 10b are operated for heating).
  • the high-pressure heat-source-side refrigerant sent to the second usage units 10a, 10b is sent to the second usage-side heat exchangers 101a, 101b through the second usage-side gas refrigerant tubes 104a, 104b.
  • the high-pressure heat-source-side refrigerant sent to the second usage-side heat exchangers 101a and 101b exchanges heat with the air medium supplied by the usage-side fans 105a and 105b in the second usage-side heat exchangers 101a and 101b. To dissipate heat, thereby heating the room.
  • the high-pressure heat-source-side refrigerant radiated in the second usage-side heat exchangers 101a and 101b passes through the second usage-side flow rate adjustment valves 102a and 102b and the second usage-side liquid refrigerant tubes 103a and 103b, and the second usage units 10a and 10b.
  • the high-pressure heat source side refrigerant sent to the discharge refrigerant communication tube 12 is sent to the first usage unit 4a.
  • the high-pressure heat-source-side refrigerant sent to the first usage unit 4a is sent to the first usage-side heat exchanger 41a through the first usage-side discharge refrigerant tube 46a and the first usage-side discharge check valve 49a.
  • the high-pressure heat-source-side refrigerant sent to the first usage-side heat exchanger 41a exchanges heat with the low-pressure usage-side refrigerant in the refrigeration cycle circulating in the usage-side refrigerant circuit 40a in the first usage-side heat exchanger 41a. To dissipate heat.
  • the high-pressure heat-source-side refrigerant radiated in the first usage-side heat exchanger 41a is sent from the first usage unit 4a to the liquid refrigerant communication tube 13 through the first usage-side flow rate adjustment valve 42a and the first usage-side liquid refrigerant tube 45a. It is done.
  • the heat source side refrigerant sent from the second usage units 10a and 10b and the first usage unit 4a to the liquid refrigerant communication tube 13 merges in the liquid refrigerant communication tube 13 and is sent to the heat source unit 2.
  • the heat source side refrigerant sent to the heat source unit 2 is sent to the supercooler 27 through the liquid side closing valve 29.
  • the heat source side refrigerant sent to the subcooler 27 is sent to the heat source side expansion valve 25 without performing heat exchange because the heat source side refrigerant does not flow through the suction return pipe 26.
  • the heat source side refrigerant sent to the heat source side expansion valve 25 is depressurized by the heat source side expansion valve 25 to be in a low-pressure gas-liquid two-phase state, and sent to the heat source side heat exchanger 24 through the heat source side liquid refrigerant tube 24a. It is done.
  • the low-pressure refrigerant sent to the heat source side heat exchanger 24 evaporates by exchanging heat with outdoor air supplied by the heat source side fan 32 in the heat source side heat exchanger 24.
  • the low-pressure heat source side refrigerant evaporated in the heat source side heat exchanger 24 is sent to the heat source side accumulator 28 through the first heat source side gas refrigerant tube 23a and the heat source side switching mechanism 23.
  • the low-pressure heat source side refrigerant sent to the heat source side accumulator 28 is again sucked into the heat source side compressor 21 through the heat source side suction pipe 21c.
  • the low-pressure usage-side refrigerant in the refrigeration cycle circulating in the usage-side refrigerant circuit 40a is heated and evaporated by the heat radiation of the heat source-side refrigerant in the first usage-side heat exchanger 41a.
  • the low-pressure usage-side refrigerant evaporated in the first usage-side heat exchanger 41a is sent to the usage-side accumulator 67a through the second cascade-side gas refrigerant tube 69a.
  • the low-pressure use-side refrigerant sent to the use-side accumulator 67a is sucked into the use-side compressor 62a through the cascade-side suction pipe 71a, compressed to a high pressure in the refrigeration cycle, and then discharged to the cascade-side discharge pipe 70a.
  • the high-pressure use-side refrigerant discharged to the cascade-side discharge pipe 70a is sent to the refrigerant-water heat exchanger 65a through the first cascade-side gas refrigerant pipe 72a.
  • the high-pressure use-side refrigerant sent to the refrigerant-water heat exchanger 65a radiates heat by exchanging heat with the aqueous medium circulating in the aqueous medium circuit 80a by the circulation pump 43a in the refrigerant-water heat exchanger 65a.
  • the high-pressure use-side refrigerant that has radiated heat in the refrigerant-water heat exchanger 65a is decompressed in the refrigerant-water heat exchange side flow rate control valve 66a to become a low-pressure gas-liquid two-phase state, and passes through the cascade-side liquid refrigerant pipe 68a. Again, it is sent to the 1st utilization side heat exchanger 41a.
  • the aqueous medium circulating in the aqueous medium circuit 80a is heated by the heat radiation of the use-side refrigerant in the refrigerant-water heat exchanger 65a.
  • the aqueous medium heated in the refrigerant-water heat exchanger 65a is drawn into the circulation pump 43a through the first usage-side water outlet pipe 48a, and after being pressurized, is sent from the first usage unit 4a to the aqueous medium communication pipe 16a. It is done.
  • the aqueous medium sent to the hot water storage unit 8a exchanges heat with the aqueous medium in the hot water storage tank 81a in the heat exchange coil 82a to radiate heat, thereby heating the aqueous medium in the hot water storage tank 81a.
  • the aqueous medium sent to the hot water heating unit 9a dissipates heat in the heat exchange panel 91a, thereby heating the indoor wall or the like or heating the indoor floor. In this way, the hot water supply operation of the first usage unit 4a and the heating operation of the second usage unit 10a and / or the second usage unit 10b are performed.
  • the heat source side refrigerant circuit 20 switches the heat source side.
  • the mechanism 23 is switched to the heat source side heat radiation operation state (the state indicated by the solid line of the heat source side switching mechanism 23 in FIG. 6).
  • the aqueous medium switching mechanism 161a is switched to a state of supplying the aqueous medium to the hot water storage unit 8a.
  • the switching state of the heat source side switching mechanism 23 as the temperature control mode is switched to the heat source side evaporation operation state by one of the second usage side controllers 108a and 108b, and then the first usage side controller 77a.
  • the operation command the operation (hot water supply operation) of the first usage unit 4a (and the hot water storage unit 8a and / or the hot water heating unit 9a) and the operation command of the second usage side controller 108a and / or the second usage side controller 108b
  • the second usage unit 10a and / or the second usage unit 10b is operated (cooling operation).
  • the low pressure heat source side refrigerant in the refrigeration cycle is sucked into the heat source side compressor 21 through the heat source side suction pipe 21c and compressed to a high pressure in the refrigeration cycle, and then the heat source side refrigerant circuit 20 is cooled. It is discharged to the discharge pipe 21b.
  • the high pressure heat source side refrigerant discharged to the heat source side discharge pipe 21b is separated from the refrigerating machine oil in the oil separator 22a.
  • the refrigerating machine oil separated from the heat source side refrigerant in the oil separator 22a is returned to the heat source side suction pipe 21c through the oil return pipe 22b.
  • a part of the high-pressure heat source side refrigerant from which the refrigerating machine oil has been separated is sent from the heat source unit 2 to the discharge refrigerant communication pipe 12 through the heat source side discharge branch pipe 21d and the discharge side shut-off valve 31, and the rest is used as the heat source. It is sent to the heat source side heat exchanger 24 through the side switching mechanism 23 and the first heat source side gas refrigerant tube 23a.
  • the high-pressure heat-source-side refrigerant sent to the heat-source-side heat exchanger 24 radiates heat by exchanging heat with outdoor air supplied by the heat-source-side fan 32 in the heat source-side heat exchanger 24.
  • the high-pressure heat-source-side refrigerant that has radiated heat in the heat-source-side heat exchanger is sent to the supercooler 27 through the heat source-side expansion valve 25.
  • the heat source side refrigerant sent to the subcooler 27 is cooled so as to be in a supercooled state by exchanging heat with the heat source side refrigerant branched from the heat source side liquid refrigerant tube 24a to the suction return tube 26.
  • the heat source side refrigerant flowing through the suction return pipe 26 is returned to the heat source side suction pipe 21c.
  • the heat source side refrigerant cooled in the subcooler 27 is sent from the heat source unit 2 to the liquid refrigerant communication tube 13 through the heat source side liquid refrigerant tube 24a and the liquid side shut-off valve 29.
  • the high-pressure heat source side refrigerant sent to the discharge refrigerant communication tube 12 is sent to the first usage unit 4a.
  • the high-pressure heat-source-side refrigerant sent to the first usage unit 4a is sent to the first usage-side heat exchanger 41a through the first usage-side discharge refrigerant tube 46a and the first usage-side discharge check valve 49a.
  • the high-pressure heat-source-side refrigerant sent to the first usage-side heat exchanger 41a exchanges heat with the low-pressure usage-side refrigerant in the refrigeration cycle circulating in the usage-side refrigerant circuit 40a in the first usage-side heat exchanger 41a. To dissipate heat.
  • the high-pressure heat-source-side refrigerant radiated in the first usage-side heat exchanger 41a is sent from the first usage unit 4a to the liquid refrigerant communication tube 13 through the first usage-side flow rate adjustment valve 42a and the first usage-side liquid refrigerant tube 45a. It is done.
  • the heat-source-side refrigerant sent from the heat source unit 2 and the first usage unit 4a to the liquid refrigerant communication tube 13 merges in the liquid refrigerant communication tube 13, and the second usage units 10a and 10b (here, the second usage unit 10a). 10b will be described as heating operation).
  • the heat-source-side refrigerant sent to the second usage units 10a and 10b is sent to the second usage-side flow rate adjustment valves 102a and 102b.
  • the heat-source-side refrigerant sent to the second usage-side flow rate adjustment valves 102a, 102b is depressurized by the second usage-side flow rate adjustment valves 102a, 102b to be in a low-pressure gas-liquid two-phase state, and the second usage-side liquid refrigerant. It is sent to the second usage side heat exchangers 101a and 101b through the tubes 103a and 103b.
  • the low-pressure heat source side refrigerant sent to the second usage side heat exchangers 101a and 101b exchanges heat with the air medium supplied by the usage side fans 105a and 105a in the second usage side heat exchangers 101a and 101b. This evaporates and cools the room.
  • the low-pressure heat-source-side refrigerant evaporated in the second usage-side heat exchangers 101a and 101b is sent from the second usage units 10a and 10b to the gas refrigerant communication tube 14 through the second usage-side gas refrigerant tubes 104a and 104b.
  • the low-pressure heat source side refrigerant sent to the gas refrigerant communication tube 14 is sent to the heat source unit 2.
  • the low-pressure heat source side refrigerant sent to the heat source unit 2 is sent to the heat source side accumulator 28 through the gas side shut-off valve 30, the second heat source side gas refrigerant tube 23b, and the heat source side switching mechanism 23.
  • the low-pressure heat source side refrigerant sent to the heat source side accumulator 28 is again sucked into the heat source side compressor 21 through the heat source side suction pipe 21c.
  • the low-pressure usage-side refrigerant in the refrigeration cycle circulating in the usage-side refrigerant circuit 40a is heated and evaporated by the heat radiation of the heat-source-side refrigerant in the first usage-side heat exchanger 41a.
  • the low-pressure usage-side refrigerant evaporated in the first usage-side heat exchanger 41a is sent to the usage-side accumulator 67a through the second cascade-side gas refrigerant tube 69a.
  • the low-pressure use-side refrigerant sent to the use-side accumulator 67a is sucked into the use-side compressor 62a through the cascade-side suction pipe 71a, compressed to a high pressure in the refrigeration cycle, and then discharged to the cascade-side discharge pipe 70a.
  • the high-pressure use-side refrigerant discharged to the cascade-side discharge pipe 70a is sent to the refrigerant-water heat exchanger 65a through the first cascade-side gas refrigerant pipe 72a.
  • the high-pressure use-side refrigerant sent to the refrigerant-water heat exchanger 65a radiates heat by exchanging heat with the aqueous medium circulating in the aqueous medium circuit 80a by the circulation pump 43a in the refrigerant-water heat exchanger 65a.
  • the high-pressure use-side refrigerant that has radiated heat in the refrigerant-water heat exchanger 65a is decompressed in the refrigerant-water heat exchange side flow rate control valve 66a to become a low-pressure gas-liquid two-phase state, and passes through the cascade-side liquid refrigerant pipe 68a. Again, it is sent to the first usage side heat exchanger 41a.
  • the aqueous medium circulating in the aqueous medium circuit 80a is heated by the heat radiation of the heat source side refrigerant in the first usage-side heat exchanger 41a.
  • the aqueous medium heated in the first usage-side heat exchanger 41a is drawn into the circulation pump 43a through the first usage-side water outlet pipe 48a, and after the pressure is increased, the first usage unit 4a supplies the aqueous medium communication pipe 16a.
  • the aqueous medium sent to the aqueous medium communication pipe 16a is sent to the hot water storage unit 8a and / or the hot water heating unit 9a through the aqueous medium side switching mechanism 161a.
  • the aqueous medium sent to the hot water storage unit 8a exchanges heat with the aqueous medium in the hot water storage tank 81a in the heat exchange coil 82a to radiate heat, thereby heating the aqueous medium in the hot water storage tank 81a. In this way, the operation in the exhaust heat hot water supply operation in which the hot water supply operation of the first usage unit 4a is performed and the cooling operation of the second usage unit 10a and / or the second usage unit 10b is performed.
  • one of the second usage-side controllers 108a and 108b that commands the second usage units 10a and 10b (here, Temperature control mode switching control capable of operating by switching to a temperature control mode different from the switching state of the heat source side switching mechanism 23 as the temperature control mode commanded by the second use side controller 108a).
  • Temperature control mode switching control capable of operating by switching to a temperature control mode different from the switching state of the heat source side switching mechanism 23 as the temperature control mode commanded by the second use side controller 108a.
  • the temperature control mode switching control is the same as the temperature control mode switching control in the heat pump system 300 of the third embodiment (see FIG. 5 and the like), the description thereof is omitted here. Thereby, also in this heat pump system 400, the effect similar to the heat pump system 300 of 3rd Embodiment can be acquired.
  • a centralized controller 37 other than the first usage-side controller 77 a and the second usage-side controllers 108 a and 108 b is provided, and the centralized controller 37 provides the temperature.
  • the adjustment mode may be switched.
  • the centralized controller 37 does not perform control settings or operation commands for individual usage units such as the first usage unit 4a and the second usage units 10a and 10b, but the entire heat pump system including switching of the temperature control mode. Common control settings and operation commands are performed.
  • the central controller 37 is made to switch the temperature control mode, for example, if the temperature control mode is left switched to the heat source side evaporation operation state, the operation is performed in an operating condition that requires a cooling operation such as summer. Each time the cooling operation of the second usage units 10a and 10b is performed, the temperature control mode is switched to the heat source side heat radiation operation state, and the temperature control mode is still switched to the heat source side heat radiation operation state. If left unattended, under the operating conditions that require heating operation, such as in winter, the temperature adjustment mode is switched to the heat source side evaporation operation state each time the second usage unit 10a, 10b is heated. The temperature control mode is frequently switched.
  • the temperature control mode is almost always left switched to the heat source side evaporation operation state. In the operating conditions that require this, every time the second usage units 10a and 10b are cooled, the temperature control mode is switched to the heat source side heat radiation operation state, and the temperature control mode is frequently switched. Will be done. As described above, if the first use side controller 77a or the centralized controller 37 switches the temperature control mode, the temperature control mode may be frequently switched, which is not preferable.
  • the temperature control mode is switched to the heat source side heat radiation operation state in an operation condition that requires cooling operation such as summer.
  • the temperature control mode is switched to the heat source side evaporation operation state, and the temperature control mode is frequently switched. Can be prevented. Therefore, from the viewpoint of enabling operation by switching to a temperature control mode different from the commanded temperature control mode, basically, the first use side controller 77a and the second use side controller 108a are used. 108b or the centralized controller 37, the temperature control mode may be switched.
  • the temperature control mode is preferably switched by the second usage-side controllers 108a and 108b.
  • ⁇ B> In the above-described heat pump systems 1, 200, 300, and 400 (see FIGS. 1, 3, 4, and 6), one first usage unit 4a and two second usage units 10a and 10b in the heat source unit 2 are refrigerant communication tubes. However, the present invention is not limited to this, and there may be a plurality of first usage units, and there may be one or three or more second usage units.
  • ⁇ C> In the heat pump systems 200 and 400 according to the second and fourth embodiments, the HFC-134a is used as the use-side refrigerant, but is not limited to this. (-Tetrafluoro-1-propene) or the like, a refrigerant whose pressure corresponding to a saturated gas temperature of 65 ° C. is at most 2.8 MPa or less, preferably 2.0 MPa or less.
  • the present invention is suitable for a desired operation in a heat pump system in which a use unit for performing a hot water supply operation for heating an aqueous medium and a use unit for cooling or heating an air medium are connected to a common heat source unit.
  • the temperature control mode can be switched.

Abstract

A heat pump system (1) has such a configuration that a first utilization unit (4a) which performs hot water supply operation for heating a water medium and a second utilization unit (10a) which performs cooling/ heating operation for cooling or heating an air medium are connected with a common heat source unit (2) in a state where the hot water supply operation, cooling operation or heating operation cannot be selected individually, and the heat pump system can be operated by switching to a temperature control mode which is different from the switching state of a heat source side switching mechanism (23) as a temperature control mode which is commanded by a first utilization side controller (77a).

Description

ヒートポンプシステムHeat pump system
　本発明は、ヒートポンプシステム、特に、水媒体を加熱する給湯運転を行う利用ユニットと空気媒体の冷却や加熱を行う利用ユニットとが両者に共通の熱源ユニットに接続されたヒートポンプシステムに関する。 The present invention relates to a heat pump system, and more particularly, to a heat pump system in which a utilization unit for performing a hot water supply operation for heating an aqueous medium and a utilization unit for cooling and heating an air medium are connected to a common heat source unit.
　従来より、特許文献１（特開２０００－４６４１７号公報）に示されるような、床暖房パネルが接続された温水熱交換器と室内暖房を行う室内熱交換器とを有するヒートポンプ式温水床暖房装置がある。このようなヒートポンプ式温水床暖房装置は、主として、温水熱交換器と室内熱交換器とが両者に共通の圧縮機、四路弁及び室外熱交換器等に接続されることによって構成されている。 Conventionally, a heat pump type hot water floor heating apparatus having a hot water heat exchanger to which a floor heating panel is connected and an indoor heat exchanger for performing room heating, as disclosed in Patent Document 1 (Japanese Patent Laid-Open No. 2000-46417). There is. Such a heat pump type hot water floor heating apparatus is mainly configured by connecting a hot water heat exchanger and an indoor heat exchanger to a compressor, a four-way valve, an outdoor heat exchanger and the like common to both. .
　上記従来のヒートポンプ式温水床暖房装置を室内熱交換器による室内の冷暖房として使用するとともに、床暖房パネルとともに又は床暖房パネルに代えて貯湯ユニットを温水熱交換器に接続して給湯にも使用することが考えられる。この場合には、空気の冷却／加熱による室内の冷暖房と水の加熱による床暖房等を含む給湯という目的の違いを考慮して、室内の冷暖房用のコントローラ及び給湯用のコントローラを設けるとともに、両コントローラの一方に四路弁の操作を行う機能を持たせるか、又は、四路弁の操作を行うための集中コントローラを設けて、室内冷房、室内暖房、又は、給湯を切り換える際に四路弁の操作を行う必要がある。しかし、ユーザーは、このようなヒートポンプシステムを、単に、冷暖房装置と給湯装置とが併存したものと受け取ってしまうため、四路弁の操作の必要性を認識できず、四路弁の操作を忘れたり、操作ミスを生じるおそれがあり、また、四路弁の操作も煩雑である。 The conventional heat pump type hot water floor heating device is used for indoor air conditioning by an indoor heat exchanger, and is also used for hot water supply by connecting a hot water storage unit to the hot water heat exchanger together with or instead of the floor heating panel. It is possible. In this case, taking into account the difference in the purpose of hot water supply including indoor air conditioning by air cooling / heating and floor heating by water heating, etc., an indoor air conditioning controller and hot water controller are provided, Provide one controller with a function to operate the four-way valve, or provide a centralized controller to operate the four-way valve, and switch the four-way valve when switching between indoor cooling, indoor heating, or hot water supply. It is necessary to perform the operation. However, since the user simply receives such a heat pump system as a combination of a cooling / heating device and a hot water supply device, the user cannot recognize the necessity of operating the four-way valve and forgets to operate the four-way valve. Operation errors may occur, and the operation of the four-way valve is complicated.
　このように、水媒体を加熱する給湯運転を行う利用ユニットと空気媒体の冷却や加熱を行う利用ユニットとが両者に共通の熱源ユニットに接続されたヒートポンプシステムでは、各利用ユニット自体の操作だけでなく、四路弁の切換状態というシステム全体の温調モードの切り換えが必要となるため、操作が煩雑になり、また、温調モードの切り換え忘れや切り換えミスによって、所望の運転を行うことができないおそれがある。
　本発明の課題は、水媒体を加熱する給湯運転を行う利用ユニットと空気媒体の冷却や加熱を行う利用ユニットとが両者に共通の熱源ユニットに接続されたヒートポンプシステムにおいて、所望の運転に適した温調モードの切り換えが行われるようにすることにある。 As described above, in the heat pump system in which the use unit for performing the hot water supply operation for heating the aqueous medium and the use unit for cooling and heating the air medium are connected to the common heat source unit, only the operation of each use unit itself is performed. In addition, since the temperature control mode of the entire system, which is the switching state of the four-way valve, is required, the operation becomes complicated, and a desired operation cannot be performed due to forgetting to switch the temperature control mode or a switching error. There is a fear.
An object of the present invention is suitable for a desired operation in a heat pump system in which a use unit for performing a hot water supply operation for heating an aqueous medium and a use unit for cooling and heating an air medium are connected to a common heat source unit. The purpose is to switch the temperature control mode.
　第１の観点にかかるヒートポンプシステムは、熱源ユニットと、熱源ユニットに接続された第１利用ユニット及び第２利用ユニットとを備えている。熱源ユニットは、冷媒を圧縮する圧縮機と、熱源側熱交換器と、熱源側熱交換器を冷媒の放熱器として機能させる放熱運転状態と熱源側熱交換器を冷媒の蒸発器として機能させる蒸発運転状態とを切り換えることが可能な熱源側切換機構とを有している。第１利用ユニットは、熱源側切換機構が蒸発運転状態において冷媒の放熱器として機能する第１利用側熱交換器を有しており、第１利用側熱交換器における冷媒の放熱によって水媒体を加熱する給湯運転を行うことが可能である。第２利用ユニットは、熱源側切換機構が放熱運転状態において冷媒の蒸発器として機能し、熱源側切換機構が蒸発運転状態において冷媒の放熱器として機能する第２利用側熱交換器を有しており、第２利用側熱交換器における冷媒の蒸発によって空気媒体を冷却する冷房運転を行い、第２利用側熱交換器における冷媒の放熱によって空気媒体を加熱する暖房運転を行うことが可能である。そして、このヒートポンプシステムは、第１利用ユニット及び第２利用ユニットは、個別に給湯運転、冷房運転又は暖房運転を選択して運転できないものであり、第１利用ユニットに指令を行う第１利用側コントローラ、第２利用ユニットに指令を行う第２利用側コントローラ、又は、第１利用側コントローラ及び第２利用側コントローラとは別の集中コントローラが指令している温調モードとしての熱源側切換機構の切換状態とは異なる温調モードに切り換えて運転することが可能である。 The heat pump system according to the first aspect includes a heat source unit, and a first usage unit and a second usage unit connected to the heat source unit. The heat source unit includes a compressor that compresses the refrigerant, a heat source side heat exchanger, a heat radiation operation state in which the heat source side heat exchanger functions as a refrigerant radiator, and an evaporation in which the heat source side heat exchanger functions as a refrigerant evaporator. A heat source side switching mechanism capable of switching between operating states. The first usage unit has a first usage-side heat exchanger in which the heat source side switching mechanism functions as a refrigerant radiator in the evaporation operation state, and the aqueous medium is removed by the heat radiation of the refrigerant in the first usage-side heat exchanger. It is possible to perform a hot water supply operation for heating. The second usage unit includes a second usage-side heat exchanger in which the heat source side switching mechanism functions as a refrigerant evaporator in the heat dissipation operation state, and the heat source side switching mechanism functions as a refrigerant radiator in the evaporation operation state. In addition, it is possible to perform a cooling operation in which the air medium is cooled by evaporation of the refrigerant in the second usage-side heat exchanger, and a heating operation in which the air medium is heated by the heat radiation of the refrigerant in the second usage-side heat exchanger. . In the heat pump system, the first usage unit and the second usage unit cannot be operated by individually selecting a hot water supply operation, a cooling operation, or a heating operation, and the first usage side that gives a command to the first usage unit Of the heat source side switching mechanism as the temperature control mode commanded by the controller, the second usage side controller that commands the second usage unit, or the centralized controller different from the first usage side controller and the second usage side controller It is possible to operate by switching to a temperature control mode different from the switching state.
　このヒートポンプシステムでは、第１利用ユニットに指令を行う第１利用側コントローラ、第２利用ユニットに指令を行う第２利用側コントローラ、又は、第１利用側コントローラ及び第２利用側コントローラとは別の集中コントローラによって、例えば、給湯運転のみを行う場合には、温調モードを蒸発運転状態に切り換えた上で、第１利用側コントローラの指令によって第１利用ユニットの運転が行われ、冷房運転のみを行う場合には、温調モードを放熱運転状態に切り換えた上で、第２利用側コントローラの指令によって第２利用ユニットの運転が行われ、暖房運転のみを行う場合には、温調モードを蒸発運転状態に切り換えた上で、第２利用側コントローラの指令によって第２利用ユニットの運転が行われ、給湯運転とともに暖房運転を行う場合には、温調モードを蒸発運転状態に切り換えた上で、第１利用側コントローラの指令によって第１利用ユニットの運転が行われるとともに第２利用側コントローラの指令によって第２利用ユニットの運転が行われる。そして、温調モードを放熱運転状態に切り換えたままでは、給湯運転や暖房運転を行うことができず、また、温調モードを蒸発運転状態に切り換えたままでは、冷房運転を行うことができない。 In this heat pump system, the first usage side controller that commands the first usage unit, the second usage side controller that commands the second usage unit, or the first usage side controller and the second usage side controller are different. For example, when only the hot water supply operation is performed by the centralized controller, the temperature control mode is switched to the evaporation operation state, and then the operation of the first usage unit is performed by the command of the first usage side controller, and only the cooling operation is performed. When performing the operation, the temperature control mode is switched to the heat radiation operation state, and then the operation of the second usage unit is performed according to the command of the second usage side controller. When only the heating operation is performed, the temperature control mode is evaporated. After switching to the operation state, the operation of the second usage unit is performed according to the command of the second usage side controller, and heating is performed together with the hot water supply operation. When performing the rotation, the temperature control mode is switched to the evaporation operation state, and then the first usage unit is operated according to the command from the first usage side controller, and the second usage unit is controlled according to the command from the second usage side controller. Is operated. Then, the hot water supply operation and the heating operation cannot be performed while the temperature control mode is switched to the heat radiation operation state, and the cooling operation cannot be performed while the temperature control mode is switched to the evaporation operation state.
　このように、第１利用ユニット及び第２利用ユニットにおいて所望の運転を行うためには、第１利用側コントローラから第１利用ユニットへの給湯運転の指令や第２利用側コントローラから第２利用ユニットへの冷房運転又は暖房運転の指令だけでなく、第１及び第２利用ユニットに共通の熱源ユニットにおける運転状態を決定する熱源側切換機構の切換状態である温調モードの切り換えが必要であり、その意味において、このヒートポンプシステムは、第１利用ユニット及び第２利用ユニットが個別に給湯運転、冷房運転又は暖房運転を選択して運転できないものとなっている。
　そこで、このヒートポンプシステムでは、第１利用ユニットに指令を行う第１利用側コントローラ、第２利用ユニットに指令を行う第２利用側コントローラ、又は、第１利用側コントローラ及び第２利用側コントローラとは別の集中コントローラが指令している温調モードとしての熱源側切換機構の切換状態とは異なる温調モードに切り換えて運転することを可能にしている。 As described above, in order to perform a desired operation in the first usage unit and the second usage unit, a hot water supply operation command from the first usage side controller to the first usage unit or from the second usage side controller to the second usage unit. It is necessary to switch the temperature control mode, which is a switching state of the heat source side switching mechanism that determines the operation state in the heat source unit common to the first and second usage units, as well as a command for cooling operation or heating operation to In that sense, in the heat pump system, the first usage unit and the second usage unit cannot be operated by individually selecting a hot water supply operation, a cooling operation, or a heating operation.
Therefore, in this heat pump system, the first usage side controller that commands the first usage unit, the second usage side controller that commands the second usage unit, or the first usage side controller and the second usage side controller It is possible to operate by switching to a temperature control mode different from the switching state of the heat source side switching mechanism as the temperature control mode commanded by another centralized controller.
　これにより、このヒートポンプシステムでは、例えば、温調モードが放熱運転状態に切り換えられた状態において給湯運転を行う場合には、温調モードが蒸発運転状態に切り換えられる等のように、ユーザーが温調モードを切り換える操作（指令）を行うことなく、所望の運転に適した温調モードに切り換えを行うことができる。 Thus, in this heat pump system, for example, when the hot water supply operation is performed in a state where the temperature control mode is switched to the heat dissipation operation state, the user can adjust the temperature control such that the temperature control mode is switched to the evaporation operation state. Switching to a temperature control mode suitable for a desired operation can be performed without performing an operation (command) for switching the mode.
　第２の観点にかかるヒートポンプシステムは、第１の観点にかかるヒートポンプシステムにおいて、温調モードが放熱運転状態になっている際において、第１利用側コントローラから第１利用ユニットに給湯運転が指令された場合には、温調モードを蒸発運転状態に切り換えて、第１利用ユニットの給湯運転を行う運転である優先給湯運転を行う。
　このヒートポンプシステムでは、温調モードが放熱運転状態になっている際において、第１利用側コントローラから第１利用ユニットに給湯運転が指令された場合には、温調モードを放熱運転状態から蒸発運転状態に切り換えることで、第１利用ユニットの給湯運転を行うことができるため、夏期等の冷房運転が必要な運転条件においても、ユーザーが温調モードを蒸発運転状態に切り換えする操作（指令）を行うことなく、必要に応じて給湯運転を行うことができる。 In the heat pump system according to the second aspect, in the heat pump system according to the first aspect, the hot water supply operation is commanded from the first usage side controller to the first usage unit when the temperature control mode is in the heat dissipation operation state. If this happens, the temperature control mode is switched to the evaporation operation state, and the priority hot water supply operation, which is the operation of performing the hot water supply operation of the first usage unit, is performed.
In this heat pump system, when the temperature control mode is in the heat dissipation operation state, when the hot water supply operation is instructed from the first usage side controller to the first usage unit, the temperature control mode is changed from the heat dissipation operation state to the evaporation operation. Since the hot water supply operation of the first usage unit can be performed by switching to the state, the user can perform an operation (command) for switching the temperature control mode to the evaporation operation state even in an operation condition that requires a cooling operation such as summer. A hot water supply operation can be performed as necessary without performing the operation.
　第３の観点にかかるヒートポンプシステムは、第２の観点にかかるヒートポンプシステムにおいて、優先給湯運転中は、第２利用ユニットの冷房運転を禁止する。
　優先給湯運転を行うために、温調モードを放熱運転状態から蒸発運転状態に切り換えると、第２利用ユニットが暖房運転を行う状態に切り換えられることになり、優先給湯運転が開始されるまで第２利用ユニットが冷房運転を行っていた場合には、第２利用ユニットが暖房運転を行う状態になり、また、優先給湯運転中に第２利用側コントローラから第２利用ユニットに冷房運転が指令された場合に暖房運転を開始してしまうため、室内の快適性が損なわれて好ましくない。
　そこで、このヒートポンプシステムでは、優先給湯運転を行う際には、第２利用ユニットの冷房運転を禁止するようにしている。
　これにより、このヒートポンプシステムでは、優先給湯運転を行う際に、室内の快適性が損なわれることを防ぐことができる。 In the heat pump system according to the third aspect, the heat pump system according to the second aspect prohibits the cooling operation of the second usage unit during the priority hot water supply operation.
When the temperature control mode is switched from the heat radiation operation state to the evaporation operation state to perform the priority hot water supply operation, the second usage unit is switched to the heating operation state, and the second hot water supply operation is started until the priority hot water supply operation is started. When the usage unit is performing the cooling operation, the second usage unit is in a state of performing the heating operation, and during the priority hot water supply operation, the second usage unit is instructed to perform the cooling operation. In this case, the heating operation is started, which is not preferable because the indoor comfort is impaired.
Therefore, in this heat pump system, the cooling operation of the second usage unit is prohibited when the priority hot water supply operation is performed.
Thereby, in this heat pump system, when performing priority hot water supply operation, it can prevent that indoor comfort is impaired.
　第４の観点にかかるヒートポンプシステムは、第３の観点にかかるヒートポンプシステムにおいて、第２利用ユニットは、第２利用側熱交換器に空気媒体を供給する利用側ファンをさらに有しており、第２利用側コントローラから冷房運転が指令されている第２利用ユニットについては、優先給湯運転中は、冷房運転を停止した状態で利用側ファンを運転する。
　このヒートポンプシステムでは、優先給湯運転において、第２利用ユニットの冷房運転を禁止するため、この際に、第２利用側コントローラから冷房運転が指令されている第２利用ユニットについて、利用側ファンの運転も停止してしまうと、ユーザーが第２利用ユニットの故障が発生したものと誤解するおそれがある。 A heat pump system according to a fourth aspect is the heat pump system according to the third aspect, wherein the second usage unit further includes a usage-side fan that supplies an air medium to the second usage-side heat exchanger, For the second usage unit for which the cooling operation is commanded from the two usage-side controller, the usage-side fan is operated with the cooling operation stopped during the priority hot water supply operation.
In this heat pump system, the cooling operation of the second usage unit is prohibited in the priority hot water supply operation. At this time, the operation of the usage-side fan is performed for the second usage unit for which the cooling operation is commanded from the second usage-side controller. If the operation stops, the user may misunderstand that the second usage unit has failed.
　そこで、このヒートポンプシステムでは、第２利用側コントローラから冷房運転が指令されている第２利用ユニットについては、優先給湯運転中は、冷房運転を停止した状態で利用側ファンを運転するようにしている。
　これにより、このヒートポンプシステムでは、優先給湯運転を行うことでユーザーが第２利用ユニットの故障が発生したものと誤解しないようにすることができる。 Therefore, in this heat pump system, for the second usage unit for which the cooling operation is commanded from the second usage-side controller, the usage-side fan is operated with the cooling operation stopped during the priority hot water supply operation. .
Thereby, in this heat pump system, it can prevent that a user misunderstands that the failure of the 2nd utilization unit has occurred by performing priority hot water supply operation.
　第５の観点にかかるヒートポンプシステムは、第４の観点にかかるヒートポンプシステムにおいて、第２利用側コントローラは、優先給湯運転における第２利用ユニットの冷房運転の停止中においても、冷房運転中である旨の表示を維持する。
　このヒートポンプシステムでは、優先給湯運転において、第２利用ユニットの冷房運転を停止することに連動して、第２利用側コントローラにおける第２利用ユニットの運転状態の表示を変更してしまうと、ユーザーが第２利用ユニットの故障が発生したものと誤解するおそれがある。 The heat pump system according to the fifth aspect is the heat pump system according to the fourth aspect, wherein the second usage-side controller is in the cooling operation even when the cooling operation of the second usage unit in the priority hot water supply operation is stopped. Keep the display.
In this heat pump system, in the priority hot water supply operation, if the display of the operation state of the second usage unit in the second usage side controller is changed in conjunction with stopping the cooling operation of the second usage unit, the user There is a risk of misunderstanding that the second usage unit has failed.
　そこで、このヒートポンプシステムでは、優先給湯運転における第２利用ユニットの冷房運転の停止中においても、第２利用側コントローラが冷房運転中である旨の表示を維持するようにしている。
　これにより、このヒートポンプシステムでは、優先給湯運転を行うことでユーザーが第２利用ユニットの故障が発生したものと誤解しないようにすることができる。 Therefore, in this heat pump system, even when the cooling operation of the second usage unit in the priority hot water supply operation is stopped, the display indicating that the second usage-side controller is in the cooling operation is maintained.
Thereby, in this heat pump system, it can prevent that a user misunderstands that the failure of the 2nd utilization unit has occurred by performing priority hot water supply operation.
　第６の観点にかかるヒートポンプシステムは、第１～第５の観点のいずれかにかかるヒートポンプシステムにおいて、温調モードの切り換えは、指令された温調モード及び外気温度の少なくとも１つに基づいて行われる。
　このヒートポンプシステムでは、温調モードの切り換えを指令された温調モード及び外気温度の少なくとも１つに基づいて行うようにしているため、温調モードの切り換えを適切に行うことができる。 In the heat pump system according to the sixth aspect, in the heat pump system according to any one of the first to fifth aspects, the temperature control mode is switched based on at least one of the commanded temperature control mode and the outside air temperature. Is called.
In this heat pump system, switching of the temperature control mode is performed based on at least one of the commanded temperature control mode and the outside air temperature, so that the temperature control mode can be switched appropriately.
　第７の観点にかかるヒートポンプシステムは、第１～第６の観点のいずれかにかかるヒートポンプシステムにおいて、第１利用ユニットは、熱源側切換機構が放熱運転状態において、第２利用側熱交換器を冷媒の蒸発器として機能させるとともに、第１利用側熱交換器を冷媒の放熱器として機能させることが可能となるように、熱源ユニットに接続されている。
　このヒートポンプシステムでは、温調モードが放熱運転状態であっても、第２利用側熱交換器を冷媒の蒸発器として機能させるとともに、第１利用側熱交換器を冷媒の放熱器として機能させることが可能となるように、熱源ユニットに接続されているため、給湯運転とともに冷房運転を行う排熱給湯運転を行う場合には、温調モードを放熱運転状態に切り換えた上で、第１利用側コントローラの指令によって第１利用ユニットの運転が行われるとともに第２利用側コントローラの指令によって第２利用ユニットの運転が行われる。 A heat pump system according to a seventh aspect is the heat pump system according to any of the first to sixth aspects, wherein the first usage unit includes the second usage-side heat exchanger when the heat source side switching mechanism is in the heat radiation operation state. While functioning as a refrigerant evaporator, the first use side heat exchanger is connected to the heat source unit so that it can function as a refrigerant radiator.
In this heat pump system, even if the temperature control mode is in the heat radiation operation state, the second usage side heat exchanger functions as a refrigerant evaporator and the first usage side heat exchanger functions as a refrigerant radiator. Since it is connected to the heat source unit so that it is possible, when performing the exhaust heat hot water supply operation in which the cooling operation is performed together with the hot water supply operation, the temperature control mode is switched to the heat radiation operation state, and then the first usage side The first usage unit is operated by a command from the controller and the second usage unit is operated by a command from the second usage side controller.
　しかし、このような排熱給湯運転を行う場合には、第２利用側熱交換器における蒸発負荷に見合う分の第１利用側熱交換器における放熱負荷によって給湯運転が行われることになるため、所望の給湯負荷をまかなうことができないこともあり、この場合には、温調モードを蒸発運転状態に切り換えて給湯運転を行う必要がある。また、春期や秋期等には、必要に応じて冷房運転や暖房運転を行うこともあり、この場合にも、温調モードの切り換えが必要である。
　このように、このヒートポンプシステムのような、排熱給湯運転を行うことが可能な構成であっても、温調モードの切り換えが必要であり、その意味において、このヒートポンプシステムも、第１利用ユニット及び第２利用ユニットが個別に給湯運転、冷房運転又は暖房運転を選択して運転できないものであるといえる。 However, when performing such exhaust heat hot water supply operation, since the hot water supply operation is performed by the heat radiation load in the first usage side heat exchanger corresponding to the evaporation load in the second usage side heat exchanger, In some cases, it is not possible to cover the desired hot water supply load. In this case, it is necessary to switch the temperature control mode to the evaporation operation state and perform the hot water supply operation. In spring and autumn, cooling operation and heating operation may be performed as necessary. In this case, the temperature control mode must be switched.
Thus, even if it is the structure which can perform a waste heat hot water supply driving | operation like this heat pump system, switching of a temperature control mode is required, In this meaning, this heat pump system is also the 1st utilization unit. And it can be said that the second usage unit cannot be operated by individually selecting a hot water supply operation, a cooling operation or a heating operation.
　そこで、このヒートポンプシステムにおいても、第１利用ユニットに指令を行う第１利用側コントローラ、第２利用ユニットに指令を行う第２利用側コントローラ、又は、第１利用側コントローラ及び第２利用側コントローラとは別の集中コントローラが指令している温調モードとしての熱源側切換機構の切換状態とは異なる温調モードに切り換えて運転することを可能にしている。
　これにより、このヒートポンプシステムでは、ユーザーが温調モードを切り換える操作（指令）を行うことなく、所望の運転に適した温調モードに切り換えを行うことができる。 Therefore, also in this heat pump system, a first usage side controller that commands the first usage unit, a second usage side controller that commands the second usage unit, or the first usage side controller and the second usage side controller, Makes it possible to switch to a temperature control mode different from the switching state of the heat source side switching mechanism as a temperature control mode commanded by another centralized controller.
Thereby, in this heat pump system, it is possible to switch to a temperature control mode suitable for a desired operation without the user performing an operation (command) for switching the temperature control mode.
　第８の観点にかかるヒートポンプシステムは、第１～第７の観点のいずれかにかかるヒートポンプシステムにおいて、温調モードの切り換えは、第２利用側コントローラによって行われる。 In the heat pump system according to the eighth aspect, in the heat pump system according to any one of the first to seventh aspects, the temperature control mode is switched by the second usage-side controller.
　このヒートポンプシステムでは、指令された温調モードとは異なる温調モードに切り換えて運転することを可能にすることができればよいため、基本的には、第１利用側コントローラ、第２利用側コントローラ、又は、集中コントローラのいずれに温調モードの切り換えを行わせるようにしてもよい。
　しかし、集中コントローラに温調モードの切り換えを行わせるようにすると、例えば、温調モードが蒸発運転状態に切り換えられたままで放置されると、夏期等の冷房運転が必要な運転条件においては、第２利用ユニットの冷房運転が行われる毎に、温調モードが放熱運転状態に切り換えられることになり、また、温調モードが放熱運転状態に切り換えられたままで放置されると、冬期等の暖房運転が必要な運転条件においては、第２利用ユニットの暖房運転が行われる毎に、温調モードが蒸発運転状態に切り換えられることになり、温調モードの切り換えが頻繁に行われることになってしまう。また、第１利用側コントローラに温調モードの切り換えを行わせるようにすると、温調モードが蒸発運転状態に切り換えられたままで放置されることがほとんどであるため、夏期等の冷房運転が必要な運転条件においては、第２利用ユニットの冷房運転が行われる毎に、温調モードが放熱運転状態に切り換えられることになってしまい、温調モードの切り換えが頻繁に行われることになってしまう。このように、第１利用側コントローラや集中コントローラに温調モードの切り換えを行わせるようにすると、温調モードの切り換えが頻繁に行われるおそれがあり、好ましくない。 In this heat pump system, since it is only necessary to be able to operate by switching to a temperature control mode different from the commanded temperature control mode, basically, the first use side controller, the second use side controller, Alternatively, the temperature controller mode may be switched by any of the centralized controllers.
However, if the central controller is made to switch the temperature control mode, for example, if the temperature control mode is left switched to the evaporating operation state, the operation will be performed under the operating conditions that require cooling operation such as summer. 2 Each time the cooling operation of the unit used is performed, the temperature control mode is switched to the heat dissipation operation state, and if the temperature control mode is left switched to the heat dissipation operation state, the heating operation in the winter season etc. In the operation conditions that require the temperature control mode, the temperature control mode is switched to the evaporation operation state every time the heating operation of the second usage unit is performed, and the temperature control mode is frequently switched. . In addition, if the first use side controller is made to switch the temperature control mode, the temperature control mode is almost always left switched to the evaporation operation state, so that a cooling operation in summer or the like is necessary. Under the operating conditions, every time the cooling operation of the second usage unit is performed, the temperature control mode is switched to the heat dissipation operation state, and the temperature control mode is frequently switched. As described above, if the first use side controller or the centralized controller is allowed to switch the temperature adjustment mode, the temperature adjustment mode may be frequently switched, which is not preferable.
　そこで、このヒートポンプシステムでは、温調モードの切り換えを第２利用側コントローラによって行うようにすることで、夏期等の冷房運転が必要な運転条件においては、温調モードが放熱運転状態に切り換えられた状態が維持され、また、冬期等の暖房運転が必要な運転条件においては、温調モードが蒸発運転状態に切り換えられた状態が維持されるようになる。
　これにより、このヒートポンプシステムでは、温調モードの切り換えが頻繁に行われることを防ぐことができる。 Therefore, in this heat pump system, the temperature control mode is switched to the heat dissipation operation state in an operation condition that requires a cooling operation such as in the summer by switching the temperature control mode by the second usage-side controller. The state is maintained, and the state where the temperature control mode is switched to the evaporation operation state is maintained in an operation condition that requires a heating operation such as winter.
Thereby, in this heat pump system, it can prevent that switching of the temperature control mode is performed frequently.
本発明の第１実施形態にかかるヒートポンプシステムの概略構成図である。1 is a schematic configuration diagram of a heat pump system according to a first embodiment of the present invention. 第１実施形態及び第２実施形態における温調モード切り換え制御の制御ロジックである。It is a control logic of the temperature control mode switching control in 1st Embodiment and 2nd Embodiment. 本発明の第２実施形態にかかるヒートポンプシステムの概略構成図である。It is a schematic block diagram of the heat pump system concerning 2nd Embodiment of this invention. 本発明の第３実施形態にかかるヒートポンプシステムの概略構成図である。It is a schematic block diagram of the heat pump system concerning 3rd Embodiment of this invention. 第３実施形態及び第４実施形態における温調モード切り換え制御の制御ロジックである。It is a control logic of the temperature control mode switching control in 3rd Embodiment and 4th Embodiment. 本発明の第４実施形態にかかるヒートポンプシステムの概略構成図である。It is a schematic block diagram of the heat pump system concerning 4th Embodiment of this invention. 本発明の他の実施形態にかかるヒートポンプシステムの概略構成図である。It is a schematic block diagram of the heat pump system concerning other embodiment of this invention.
　以下、本発明にかかるヒートポンプシステムの実施形態について、図面に基づいて説明する。
　（第１実施形態）
　＜構成＞
　－全体－
　図１は、本発明の第１実施形態にかかるヒートポンプシステム１の概略構成図である。ヒートポンプシステム１は、蒸気圧縮式のヒートポンプサイクルを利用して水媒体を加熱する運転等を行うことが可能な装置である。
　ヒートポンプシステム１は、主として、熱源ユニット２と、第１利用ユニット４ａと、第２利用ユニット１０ａ、１０ｂと、液冷媒連絡管１３と、ガス冷媒連絡管１４と、貯湯ユニット８ａと、温水暖房ユニット９ａと、水媒体連絡管１５ａと、水媒体連絡管１６ａとを備えており、熱源ユニット２と第１利用ユニット４ａと第２利用ユニット１０ａ、１０ｂとが冷媒連絡管１３、１４を介して接続されることによって、熱源側冷媒回路２０を構成し、第１利用ユニット４ａと貯湯ユニット８ａと温水暖房ユニット９ａとが水媒体連絡管１５ａ、１６ａを介して接続されることによって、水媒体回路８０ａを構成している。熱源側冷媒回路２０には、ＨＦＣ系冷媒の一種であるＨＦＣ－４１０Ａが熱源側冷媒として封入されており、また、ＨＦＣ系冷媒に対して相溶性を有するエステル系又はエーテル系の冷凍機油が熱源側圧縮機２１（後述）の潤滑のために封入されている。また、水媒体回路８０ａには、水媒体としての水が循環するようになっている。 Hereinafter, an embodiment of a heat pump system according to the present invention will be described with reference to the drawings.
(First embodiment)
<Configuration>
-The entire-
FIG. 1 is a schematic configuration diagram of a heat pump system 1 according to the first embodiment of the present invention. The heat pump system 1 is an apparatus capable of performing an operation for heating an aqueous medium using a vapor compression heat pump cycle.
The heat pump system 1 mainly includes a heat source unit 2, a first usage unit 4a, second usage units 10a and 10b, a liquid refrigerant communication tube 13, a gas refrigerant communication tube 14, a hot water storage unit 8a, and a hot water heating unit. 9 a, an aqueous medium communication pipe 15 a, and an aqueous medium communication pipe 16 a, and the heat source unit 2, the first usage unit 4 a, and the second usage units 10 a and 10 b are connected via the refrigerant communication pipes 13 and 14. Thus, the heat source side refrigerant circuit 20 is configured, and the first usage unit 4a, the hot water storage unit 8a, and the hot water heating unit 9a are connected via the aqueous medium communication pipes 15a and 16a, whereby the aqueous medium circuit 80a. Is configured. In the heat source side refrigerant circuit 20, HFC-410A, which is a kind of HFC refrigerant, is sealed as a heat source refrigerant, and an ester or ether refrigerating machine oil compatible with the HFC refrigerant is used as the heat source. It is enclosed for lubrication of the side compressor 21 (described later). Further, water as an aqueous medium circulates in the aqueous medium circuit 80a.
　－熱源ユニット－
　熱源ユニット２は、屋外に設置されており、冷媒連絡管１３、１４を介して利用ユニット４ａ、１０ａ、１０ｂに接続されており、熱源側冷媒回路２０の一部を構成している。
　熱源ユニット２は、主として、熱源側圧縮機２１と、油分離機構２２と、熱源側切換機構２３と、熱源側熱交換器２４と、熱源側膨張機構２５と、吸入戻し管２６と、過冷却器２７と、熱源側アキュムレータ２８と、液側閉鎖弁２９と、ガス側閉鎖弁３０とを有している。
　熱源側圧縮機２１は、熱源側冷媒を圧縮する機構であり、ここでは、ケーシング（図示せず）内に収容されたロータリ式やスクロール式等の容積式の圧縮要素（図示せず）が、同じくケーシング内に収容された熱源側圧縮機モータ２１ａによって駆動される密閉式圧縮機が採用されている。この熱源側圧縮機２１のケーシング内には、圧縮要素において圧縮された後の熱源側冷媒が充満する高圧空間（図示せず）が形成されており、この高圧空間には、冷凍機油が溜められている。熱源側圧縮機モータ２１ａは、インバータ装置（図示せず）によって、その回転数（すなわち、運転周波数）を可変でき、これにより、熱源側圧縮機２１の容量制御が可能になっている。 -Heat source unit-
The heat source unit 2 is installed outdoors and connected to the utilization units 4a, 10a, and 10b via the refrigerant communication tubes 13 and 14, and constitutes a part of the heat source side refrigerant circuit 20.
The heat source unit 2 mainly includes a heat source side compressor 21, an oil separation mechanism 22, a heat source side switching mechanism 23, a heat source side heat exchanger 24, a heat source side expansion mechanism 25, a suction return pipe 26, and a supercooling. A heat source side accumulator 28, a liquid side closing valve 29, and a gas side closing valve 30.
The heat source side compressor 21 is a mechanism that compresses the heat source side refrigerant. Here, a rotary type or scroll type volumetric compression element (not shown) housed in a casing (not shown), Similarly, a hermetic compressor driven by a heat source side compressor motor 21a accommodated in the casing is employed. A high-pressure space (not shown) filled with the heat-source-side refrigerant after being compressed by the compression element is formed in the casing of the heat-source-side compressor 21, and refrigerating machine oil is stored in the high-pressure space. ing. The heat source side compressor motor 21a can change the rotation speed (that is, the operating frequency) by an inverter device (not shown), thereby enabling capacity control of the heat source side compressor 21.
　油分離機構２２は、熱源側圧縮機２１から吐出された熱源側冷媒中に含まれる冷凍機油を分離して熱源側圧縮機２１の吸入に戻すための機構であり、主として、熱源側圧縮機２１の熱源側吐出管２１ｂに設けられた油分離器２２ａと、油分離器２２ａと熱源側圧縮機２１の熱源側吸入管２１ｃとを接続する油戻し管２２ｂとを有している。油分離器２２ａは、熱源側圧縮機２１から吐出された熱源側冷媒中に含まれる冷凍機油を分離する機器である。油戻し管２２ｂは、キャピラリチューブを有しており、油分離器２２ａにおいて熱源側冷媒から分離された冷凍機油を熱源側圧縮機２１の熱源側吸入管２１ｃに戻す冷媒管である。
　熱源側切換機構２３は、熱源側熱交換器２４を熱源側冷媒の放熱器として機能させる熱源側放熱運転状態と熱源側熱交換器２４を熱源側冷媒の蒸発器として機能させる熱源側蒸発運転状態とを切り換え可能な四路切換弁であり、熱源側吐出管２１ｂと、熱源側吸入管２１ｃと、熱源側熱交換器２４のガス側に接続された第１熱源側ガス冷媒管２３ａと、ガス側閉鎖弁３０に接続された第２熱源側ガス冷媒管２３ｂとに接続されている。そして、熱源側切換機構２３は、熱源側吐出管２１ｂと第１熱源側ガス冷媒管２３ａとを連通させるとともに、第２熱源側ガス冷媒管２３ｂと熱源側吸入管２１ｃとを連通（熱源側放熱運転状態に対応、図１の熱源側切換機構２３の実線を参照）したり、熱源側吐出管２１ｂと第２熱源側ガス冷媒管２３ｂとを連通させるとともに、第１熱源側ガス冷媒管２３ａと熱源側吸入管２１ｃとを連通（熱源側蒸発運転状態に対応、図１の熱源側切換機構２３の破線を参照）する切り換えを行うことが可能である。尚、熱源側切換機構２３は、四路切換弁に限定されるものではなく、例えば、複数の電磁弁を組み合わせる等によって、上述と同様の熱源側冷媒の流れの方向を切り換える機能を有するように構成したものであってもよい。 The oil separation mechanism 22 is a mechanism for separating the refrigeration oil contained in the heat source side refrigerant discharged from the heat source side compressor 21 and returning it to the suction of the heat source side compressor 21, and mainly the heat source side compressor 21. The oil separator 22a provided in the heat source side discharge pipe 21b, and the oil return pipe 22b connecting the oil separator 22a and the heat source side suction pipe 21c of the heat source side compressor 21 are provided. The oil separator 22 a is a device that separates the refrigeration oil contained in the heat source side refrigerant discharged from the heat source side compressor 21. The oil return pipe 22 b has a capillary tube, and is a refrigerant pipe that returns the refrigeration oil separated from the heat source side refrigerant in the oil separator 22 a to the heat source side suction pipe 21 c of the heat source side compressor 21.
The heat source side switching mechanism 23 is a heat source side heat radiation operation state in which the heat source side heat exchanger 24 functions as a heat source side refrigerant radiator and a heat source side evaporation operation state in which the heat source side heat exchanger 24 functions as an evaporator of the heat source side refrigerant. A heat source side discharge pipe 21b, a heat source side suction pipe 21c, a first heat source side gas refrigerant pipe 23a connected to the gas side of the heat source side heat exchanger 24, and a gas It is connected to the second heat source side gas refrigerant pipe 23 b connected to the side closing valve 30. The heat source side switching mechanism 23 communicates the heat source side discharge pipe 21b and the first heat source side gas refrigerant pipe 23a, and communicates the second heat source side gas refrigerant pipe 23b and the heat source side suction pipe 21c (heat source side heat dissipation). 1) (refer to the solid line of the heat source side switching mechanism 23 in FIG. 1), the heat source side discharge pipe 21b and the second heat source side gas refrigerant pipe 23b are communicated, and the first heat source side gas refrigerant pipe 23a Switching to communicate with the heat source side suction pipe 21c (corresponding to the heat source side evaporation operation state, see the broken line of the heat source side switching mechanism 23 in FIG. 1) can be performed. The heat source side switching mechanism 23 is not limited to the four-way switching valve, and has a function of switching the flow direction of the heat source side refrigerant as described above, for example, by combining a plurality of electromagnetic valves. It may be configured.
　熱源側熱交換器２４は、熱源側冷媒と室外空気との熱交換を行うことで熱源側冷媒の放熱器又は蒸発器として機能する熱交換器であり、その液側に熱源側液冷媒管２４ａが接続されており、そのガス側に第１熱源側ガス冷媒管２３ａが接続されている。この熱源側熱交換器２４において熱源側冷媒と熱交換を行う室外空気は、熱源側ファンモータ３２ａによって駆動される熱源側ファン３２によって供給されるようになっている。
　熱源側膨張機構２５は、熱源側熱交換器２４を流れる熱源側冷媒の減圧等を行う電動膨張弁であり、熱源側液冷媒管２４ａに設けられている。
　吸入戻し管２６は、熱源側液冷媒管２４ａを流れる熱源側冷媒の一部を分岐して熱源側圧縮機２１の吸入に戻す冷媒管であり、ここでは、その一端が熱源側液冷媒管２４ａに接続されており、その他端が熱源側吸入管２１ｃに接続されている。そして、吸入戻し管２６には、開度制御が可能な吸入戻し膨張弁２６ａが設けられている。この吸入戻し膨張弁２６ａは、電動膨張弁からなる。 The heat source side heat exchanger 24 is a heat exchanger that functions as a heat source side refrigerant radiator or an evaporator by exchanging heat between the heat source side refrigerant and outdoor air, and a heat source side liquid refrigerant tube 24a on the liquid side thereof. Are connected, and the first heat source side gas refrigerant pipe 23a is connected to the gas side thereof. The outdoor air that exchanges heat with the heat source side refrigerant in the heat source side heat exchanger 24 is supplied by the heat source side fan 32 driven by the heat source side fan motor 32a.
The heat source side expansion mechanism 25 is an electric expansion valve that performs decompression of the heat source side refrigerant flowing through the heat source side heat exchanger 24, and is provided in the heat source side liquid refrigerant tube 24a.
The suction return pipe 26 is a refrigerant pipe that branches a part of the heat source side refrigerant flowing through the heat source side liquid refrigerant pipe 24a and returns it to the suction of the heat source side compressor 21, and here, one end thereof is the heat source side liquid refrigerant pipe 24a. The other end is connected to the heat source side suction pipe 21c. The suction return pipe 26 is provided with a suction return expansion valve 26a capable of opening degree control. The suction return expansion valve 26a is an electric expansion valve.
　過冷却器２７は、熱源側液冷媒管２４ａを流れる熱源側冷媒と吸入戻し管２６を流れる熱源側冷媒（より具体的には、吸入戻し膨張弁２６ａによって減圧された後の冷媒）との熱交換を行う熱交換器である。
　熱源側アキュムレータ２８は、熱源側吸入管２１ｃに設けられており、熱源側冷媒回路２０を循環する熱源側冷媒を熱源側吸入管２１ｃから熱源側圧縮機２１に吸入される前に一時的に溜めるための容器である。
　液側閉鎖弁２９は、熱源側液冷媒管２４ａと液冷媒連絡管１３との接続部に設けられた弁である。ガス側閉鎖弁３０は、第２熱源側ガス冷媒管２３ｂとガス冷媒連絡管１４との接続部に設けられた弁である。
　また、熱源ユニット２には、各種のセンサが設けられている。具体的には、熱源ユニット２には、熱源側圧縮機２１の吸入における熱源側冷媒の圧力である熱源側吸入圧力Ｐｓ１を検出する熱源側吸入圧力センサ３３と、熱源側圧縮機２１の吐出における熱源側冷媒の圧力である熱源側吐出圧力Ｐｄ１を検出する熱源側吐出圧力センサ３４と、熱源側熱交換器２４の液側における熱源側冷媒の温度である熱源側熱交換器温度Ｔｈｘを検出する熱源側熱交温度センサ３５と、外気温度Ｔｏを検出する外気温度センサ３６とが設けられている。 The subcooler 27 heats the heat source side refrigerant flowing through the heat source side liquid refrigerant pipe 24a and the heat source side refrigerant flowing through the suction return pipe 26 (more specifically, the refrigerant after being decompressed by the suction return expansion valve 26a). It is a heat exchanger that performs exchange.
The heat source side accumulator 28 is provided in the heat source side suction pipe 21c, and temporarily accumulates the heat source side refrigerant circulating in the heat source side refrigerant circuit 20 before being sucked into the heat source side compressor 21 from the heat source side suction pipe 21c. It is a container for.
The liquid side closing valve 29 is a valve provided at a connection portion between the heat source side liquid refrigerant pipe 24 a and the liquid refrigerant communication pipe 13. The gas side shut-off valve 30 is a valve provided at a connection portion between the second heat source side gas refrigerant pipe 23 b and the gas refrigerant communication pipe 14.
The heat source unit 2 is provided with various sensors. Specifically, the heat source unit 2 includes a heat source side suction pressure sensor 33 that detects a heat source side suction pressure Ps 1 that is a pressure of the heat source side refrigerant in the suction of the heat source side compressor 21, and a discharge in the heat source side compressor 21. The heat source side discharge pressure sensor 34 that detects the heat source side discharge pressure Pd1 that is the pressure of the heat source side refrigerant, and the heat source side heat exchanger temperature Thx that is the temperature of the heat source side refrigerant on the liquid side of the heat source side heat exchanger 24 are detected. A heat source side heat exchange temperature sensor 35 and an outside air temperature sensor 36 for detecting the outside air temperature To are provided.
　－液冷媒連絡管－
　液冷媒連絡管１３は、液側閉鎖弁２９を介して熱源側液冷媒管２４ａに接続されており、熱源側切換機構２３が熱源側放熱運転状態において熱源側冷媒の放熱器として機能する熱源側熱交換器２４の出口から熱源ユニット２外に熱源側冷媒を導出することが可能で、かつ、熱源側切換機構２３が熱源側蒸発運転状態において熱源ユニット２外から熱源側冷媒の蒸発器として機能する熱源側熱交換器２４の入口に熱源側冷媒を導入することが可能な冷媒管である。
　－ガス冷媒連絡管－
　ガス冷媒連絡管１４は、ガス側閉鎖弁３０を介して第２熱源側ガス冷媒管２３ｂに接続されており、熱源側切換機構２３が熱源側放熱運転状態において熱源ユニット２外から熱源側圧縮機２１の吸入に熱源側冷媒を導入することが可能で、かつ、熱源側切換機構２３が熱源側蒸発運転状態において熱源側圧縮機２１の吐出から熱源ユニット２外に熱源側冷媒を導出することが可能な冷媒管である。 -Liquid refrigerant communication tube-
The liquid refrigerant communication tube 13 is connected to the heat source side liquid refrigerant tube 24a via the liquid side shut-off valve 29, and the heat source side switching mechanism 23 functions as a heat source side refrigerant radiator in the heat source side heat radiation operation state. The heat source side refrigerant can be led out of the heat source unit 2 from the outlet of the heat exchanger 24, and the heat source side switching mechanism 23 functions as an evaporator of the heat source side refrigerant from the outside of the heat source unit 2 in the heat source side evaporation operation state. This is a refrigerant tube capable of introducing the heat source side refrigerant into the inlet of the heat source side heat exchanger 24.
-Gas refrigerant communication tube-
The gas refrigerant communication pipe 14 is connected to the second heat source side gas refrigerant pipe 23b via the gas side shutoff valve 30, and the heat source side switching mechanism 23 from outside the heat source unit 2 in the heat source side heat radiation operation state. It is possible to introduce the heat source side refrigerant into the suction of the heat source 21, and the heat source side switching mechanism 23 may lead the heat source side refrigerant out of the heat source unit 2 from the discharge of the heat source side compressor 21 in the heat source side evaporation operation state. Possible refrigerant pipe.
　－第１利用ユニット－
　第１利用ユニット４ａは、屋内に設置されており、冷媒連絡管１３、１４を介して熱源ユニット２及び第２利用ユニット１０ａ、１０ｂに接続されており、熱源側冷媒回路２０の一部を構成している。また、第１利用ユニット４ａは、水媒体連絡管１５ａ、１６ａを介して貯湯ユニット８ａ及び温水暖房ユニット９ａに接続されており、水媒体回路８０ａの一部を構成している。
　第１利用ユニット４ａは、主として、第１利用側熱交換器４１ａと、第１利用側流量調節弁４２ａと、循環ポンプ４３ａとを有している。
　第１利用側熱交換器４１ａは、熱源側冷媒と水媒体との熱交換を行うことで熱源側冷媒の放熱器として機能する熱交換器であり、その熱源側冷媒が流れる流路の液側には、第１利用側液冷媒管４５ａが接続されており、その熱源側冷媒が流れる流路のガス側には、第１利用側ガス冷媒管５４ａが接続されており、その水媒体が流れる流路の入口側には、第１利用側水入口管４７ａが接続されており、その水媒体が流れる流路の出口側には、第１利用側水出口管４８ａが接続されている。第１利用側液冷媒管４５ａには、液冷媒連絡管１３が接続されており、第１利用側ガス冷媒管５４ａには、ガス冷媒連絡管１４が接続されており、第１利用側水入口管４７ａには、水媒体連絡管１５ａが接続されており、第１利用側水出口管４８ａには、水媒体連絡管１６ａが接続されている。 -First use unit-
The first usage unit 4a is installed indoors, and is connected to the heat source unit 2 and the second usage units 10a and 10b via the refrigerant communication tubes 13 and 14, and constitutes a part of the heat source side refrigerant circuit 20. is doing. Moreover, the 1st utilization unit 4a is connected to the hot water storage unit 8a and the hot water heating unit 9a via the aqueous medium communication pipes 15a and 16a, and comprises a part of aqueous medium circuit 80a.
The first usage unit 4a mainly includes a first usage-side heat exchanger 41a, a first usage-side flow rate adjustment valve 42a, and a circulation pump 43a.
The first usage-side heat exchanger 41a is a heat exchanger that functions as a heat-source-side refrigerant radiator by performing heat exchange between the heat-source-side refrigerant and the aqueous medium, and the liquid side of the flow path through which the heat-source-side refrigerant flows Is connected to the first use side liquid refrigerant pipe 45a, and the first use side gas refrigerant pipe 54a is connected to the gas side of the flow path through which the heat source side refrigerant flows, and the aqueous medium flows. A first usage-side water inlet pipe 47a is connected to the inlet side of the flow path, and a first usage-side water outlet pipe 48a is connected to the outlet side of the flow path through which the aqueous medium flows. The liquid refrigerant communication tube 13 is connected to the first usage side liquid refrigerant tube 45a, the gas refrigerant communication tube 14 is connected to the first usage side gas refrigerant tube 54a, and the first usage side water inlet port. An aqueous medium communication pipe 15a is connected to the pipe 47a, and an aqueous medium communication pipe 16a is connected to the first usage-side water outlet pipe 48a.
　第１利用側流量調節弁４２ａは、開度制御を行うことで第１利用側熱交換器４１ａを流れる熱源側冷媒の流量を可変することが可能な電動膨張弁であり、第１利用側液冷媒管４５ａに設けられている。
　循環ポンプ４３ａは、水媒体の昇圧を行う機構であり、ここでは、遠心式や容積式のポンプ要素（図示せず）が循環ポンプモータ４４ａによって駆動されるポンプが採用されている。循環ポンプ４３ａは、第１利用側水出口管４８ａに設けられている。循環ポンプモータ４４ａは、インバータ装置（図示せず）によって、その回転数（すなわち、運転周波数）を可変でき、これにより、循環ポンプ４３ａの容量制御が可能になっている。
　これにより、第１利用ユニット４ａは、第１利用側熱交換器４１ａをガス冷媒連絡管１３から導入される熱源側冷媒の放熱器として機能させることで、第１利用側熱交換器４１ａにおいて放熱した熱源側冷媒を液冷媒連絡管１３に導出し、第１利用側熱交換器４１ａにおける熱源側冷媒の放熱によって水媒体を加熱する給湯運転を行うことが可能になっている。 The first usage-side flow rate adjustment valve 42a is an electric expansion valve capable of changing the flow rate of the heat source-side refrigerant flowing through the first usage-side heat exchanger 41a by performing opening degree control. It is provided in the refrigerant pipe 45a.
The circulation pump 43a is a mechanism for boosting the aqueous medium. Here, a pump in which a centrifugal or positive displacement pump element (not shown) is driven by a circulation pump motor 44a is employed. The circulation pump 43a is provided in the first usage-side water outlet pipe 48a. The circulation pump motor 44a can vary the rotation speed (that is, the operating frequency) by an inverter device (not shown), thereby enabling capacity control of the circulation pump 43a.
Thereby, the 1st utilization side 4a makes the 1st utilization side heat exchanger 41a function as a heat radiator of the heat source side refrigerant | coolant introduce | transduced from the gas refrigerant communication pipe | tube 13 by making the 1st utilization side heat exchanger 41a function. It is possible to perform a hot water supply operation in which the heat source side refrigerant is led to the liquid refrigerant communication tube 13 and the aqueous medium is heated by the heat radiation of the heat source side refrigerant in the first usage side heat exchanger 41a.
　また、第１利用ユニット４ａには、各種のセンサが設けられている。具体的には、第１利用ユニット４ａには、第１利用側熱交換器４１ａの液側における熱源側冷媒の温度である第１利用側冷媒温度Ｔｓｃ１を検出する第１利用側熱交温度センサ５０ａと、第１利用側熱交換器４１ａの入口における水媒体の温度である水媒体入口温度Ｔｗｒを検出する水媒体出口温度センサ５１ａと、第１利用側熱交換器４１ａの出口における水媒体の温度である水媒体出口温度Ｔｗｌを検出する水媒体出口温度センサ５２ａとが設けられている。
　－貯湯ユニット－
　貯湯ユニット８ａは、屋内に設置されており、水媒体連絡管１５ａ、１６ａを介して第１利用ユニット４ａに接続されており、水媒体回路８０ａの一部を構成している。
　貯湯ユニット８ａは、主として、貯湯タンク８１ａと、熱交換コイル８２ａとを有している。 The first usage unit 4a is provided with various sensors. Specifically, the first usage unit 4a includes a first usage-side heat exchange temperature sensor that detects a first usage-side refrigerant temperature Tsc1, which is the temperature of the heat-source-side refrigerant on the liquid side of the first usage-side heat exchanger 41a. 50a, an aqueous medium outlet temperature sensor 51a that detects an aqueous medium inlet temperature Twr that is the temperature of the aqueous medium at the inlet of the first usage-side heat exchanger 41a, and the aqueous medium at the outlet of the first usage-side heat exchanger 41a An aqueous medium outlet temperature sensor 52a that detects an aqueous medium outlet temperature Twl, which is a temperature, is provided.
-Hot water storage unit-
The hot water storage unit 8a is installed indoors, is connected to the first usage unit 4a via the aqueous medium communication pipes 15a and 16a, and constitutes a part of the aqueous medium circuit 80a.
The hot water storage unit 8a mainly includes a hot water storage tank 81a and a heat exchange coil 82a.
　貯湯タンク８１ａは、給湯に供される水媒体としての水を溜める容器であり、その上部には、蛇口やシャワー等に温水となった水媒体を送るための給湯管８３ａが接続されており、その下部には、給湯管８３ａによって消費された水媒体の補充を行うための給水管８４ａが接続されている。
　熱交換コイル８２ａは、貯湯タンク８１ａ内に設けられており、水媒体回路８０ａを循環する水媒体と貯湯タンク８１ａ内の水媒体との熱交換を行うことで貯湯タンク８１ａ内の水媒体の加熱器として機能する熱交換器であり、その入口には、水媒体連絡管１６ａが接続されており、その出口には、水媒体連絡管１５ａが接続されている。
　これにより、貯湯ユニット８ａは、第１利用ユニット４ａにおいて加熱された水媒体回路８０ａを循環する水媒体によって貯湯タンク８１ａ内の水媒体を加熱して温水として溜めることが可能になっている。尚、ここでは、貯湯ユニット８ａとして、第１利用ユニット４ａにおいて加熱された水媒体との熱交換によって加熱された水媒体を貯湯タンクに溜める型式の貯湯ユニットを採用しているが、第１利用ユニット４ａにおいて加熱された水媒体を貯湯タンクに溜める型式の貯湯ユニットを採用してもよい。 The hot water storage tank 81a is a container for storing water as an aqueous medium supplied for hot water supply, and a hot water supply pipe 83a is connected to the upper part of the hot water storage tank 81a for sending hot water to a faucet or a shower. A water supply pipe 84a for replenishing the aqueous medium consumed by the hot water supply pipe 83a is connected to the lower part.
The heat exchange coil 82a is provided in the hot water storage tank 81a, and heats the aqueous medium in the hot water storage tank 81a by exchanging heat between the aqueous medium circulating in the aqueous medium circuit 80a and the aqueous medium in the hot water storage tank 81a. A water medium communication pipe 16a is connected to an inlet of the heat exchanger, and an aqueous medium communication pipe 15a is connected to an outlet of the heat exchanger.
Thereby, the hot water storage unit 8a can heat the aqueous medium in the hot water storage tank 81a by the aqueous medium circulating in the aqueous medium circuit 80a heated in the first usage unit 4a and store it as hot water. Here, as the hot water storage unit 8a, a hot water storage unit of a type in which an aqueous medium heated by heat exchange with the aqueous medium heated in the first usage unit 4a is stored in a hot water storage tank is used. You may employ | adopt the type of hot water storage unit which accumulates the aqueous medium heated in the unit 4a in the hot water storage tank.
　また、貯湯ユニット８ａには、各種のセンサが設けられている。具体的には、貯湯ユニット８ａには、貯湯タンク８１ａに溜められる水媒体の温度である貯湯温度Ｔｗｈを検出するための貯湯温度センサ８５ａが設けられている。
　－温水暖房ユニット－
　温水暖房ユニット９ａは、屋内に設置されており、水媒体連絡管１５ａ、１６ａを介して第１利用ユニット４ａに接続されており、水媒体回路８０ａの一部を構成している。
　温水暖房ユニット９ａは、主として、熱交換パネル９１ａを有しており、ラジエータや床暖房パネル等を構成している。
　熱交換パネル９１ａは、ラジエータの場合には、室内の壁際等に設けられ、床暖房パネルの場合には、室内の床下等に設けられており、水媒体回路８０ａを循環する水媒体の放熱器として機能する熱交換器であり、その入口には、水媒体連絡管１６ａが接続されており、その出口には、水媒体連絡管１５ａが接続されている。 The hot water storage unit 8a is provided with various sensors. Specifically, the hot water storage unit 8a is provided with a hot water storage temperature sensor 85a for detecting the hot water storage temperature Twh which is the temperature of the aqueous medium stored in the hot water storage tank 81a.
-Hot water heating unit-
The hot water heating unit 9a is installed indoors, is connected to the first usage unit 4a via the aqueous medium communication pipes 15a and 16a, and constitutes a part of the aqueous medium circuit 80a.
The hot water heating unit 9a mainly has a heat exchange panel 91a, and constitutes a radiator, a floor heating panel, and the like.
In the case of a radiator, the heat exchange panel 91a is provided near the wall of the room, and in the case of a floor heating panel, the heat exchange panel 91a is provided under the floor of the room, and the water medium radiator circulating in the water medium circuit 80a. The aqueous medium communication pipe 16a is connected to the inlet of the heat exchanger, and the aqueous medium communication pipe 15a is connected to the outlet of the heat exchanger.
　－水媒体連絡管－
　水媒体連絡管１５ａは、貯湯ユニット８ａの熱交換コイル８２ａの出口及び温水暖房ユニット９ａの熱交換パネル９１ａの出口に接続されている。水媒体連絡管１６ａは、貯湯ユニット８ａの熱交換コイル８２ａの入口及び温水暖房ユニット９ａの熱交換パネル９１ａの入口に接続されている。水媒体連絡管１６ａには、水媒体回路８０ａを循環する水媒体を貯湯ユニット８ａ及び温水暖房ユニット９ａの両方、又は、貯湯ユニット８ａ及び温水暖房ユニット９ａのいずれか一方に供給するかの切り換えを行うことが可能な水媒体側切換機構１６１ａが設けられている。この水媒体側切換機構１６１ａは、三方弁からなる。
　－第２利用ユニット－
　第２利用ユニット１０ａ、１０ｂは、屋内に設置されており、冷媒連絡管１３、１４を介して熱源ユニット２に接続されており、熱源側冷媒回路２０の一部を構成している。 -Aqueous medium connection pipe-
The aqueous medium communication pipe 15a is connected to the outlet of the heat exchange coil 82a of the hot water storage unit 8a and the outlet of the heat exchange panel 91a of the hot water heating unit 9a. The aqueous medium communication pipe 16a is connected to the inlet of the heat exchange coil 82a of the hot water storage unit 8a and the inlet of the heat exchange panel 91a of the hot water heating unit 9a. The aqueous medium communication pipe 16a is switched to supply the aqueous medium circulating in the aqueous medium circuit 80a to both the hot water storage unit 8a and the hot water heating unit 9a, or to either the hot water storage unit 8a or the hot water heating unit 9a. An aqueous medium side switching mechanism 161a that can be performed is provided. The aqueous medium side switching mechanism 161a is a three-way valve.
-Second usage unit-
The second usage units 10 a and 10 b are installed indoors and connected to the heat source unit 2 via the refrigerant communication tubes 13 and 14 and constitute a part of the heat source side refrigerant circuit 20.
　第２利用ユニット１０ａは、主として、第２利用側熱交換器１０１ａと第２利用側流量調節弁１０２ａとを有している。
　第２利用側熱交換器１０１ａは、熱源側冷媒と空気媒体としての室内空気との熱交換を行うことで熱源側冷媒の放熱器又は蒸発器として機能する熱交換器であり、その液側に第２利用側液冷媒管１０３ａが接続されており、そのガス側に第２利用側ガス冷媒管１０４ａが接続されている。第２利用側液冷媒管１０３ａには、液冷媒連絡管１３が接続されており、第２利用側ガス冷媒管１０４ａには、ガス冷媒連絡管１４が接続されている。この第２利用側熱交換器１０１ａにおいて熱源側冷媒と熱交換を行う空気媒体は、利用側ファンモータ１０６ａによって駆動される利用側ファン１０５ａによって供給されるようになっている。利用側ファンモータ１０６ａは、インバータ装置（図示せず）によって、その回転数（すなわち、運転周波数）を可変でき、これにより、利用側ファン１０５ａの容量制御が可能になっている。 The second usage unit 10a mainly includes a second usage-side heat exchanger 101a and a second usage-side flow rate adjustment valve 102a.
The second usage-side heat exchanger 101a is a heat exchanger that functions as a heat-source-side refrigerant radiator or evaporator by exchanging heat between the heat-source-side refrigerant and room air as an air medium. A second usage-side liquid refrigerant tube 103a is connected, and a second usage-side gas refrigerant tube 104a is connected to the gas side thereof. A liquid refrigerant communication tube 13 is connected to the second usage side liquid refrigerant tube 103a, and a gas refrigerant communication tube 14 is connected to the second usage side gas refrigerant tube 104a. The air medium that exchanges heat with the heat source side refrigerant in the second usage side heat exchanger 101a is supplied by the usage side fan 105a driven by the usage side fan motor 106a. The use-side fan motor 106a can vary the rotation speed (that is, the operating frequency) by an inverter device (not shown), thereby enabling capacity control of the use-side fan 105a.
　第２利用側流量調節弁１０２ａは、開度制御を行うことで第２利用側熱交換器１０１ａを流れる熱源側冷媒の流量を可変することが可能な電動膨張弁であり、第２利用側液冷媒管１０３ａに設けられている。
　これにより、第２利用ユニット１０ａは、熱源側切換機構２３が熱源側放熱運転状態において、第２利用側熱交換器１０１ａを液冷媒連絡管１３から導入される熱源側冷媒の蒸発器として機能させることで、第２利用側熱交換器１０１ａにおいて蒸発した熱源側冷媒をガス冷媒連絡管１４に導出し、第２利用側熱交換器１０１ａにおける熱源側冷媒の蒸発によって空気媒体を冷却する冷房運転を行うことが可能になっており、熱源側切換機構２３が熱源側蒸発運転状態において第２利用側熱交換器１０１ａがガス冷媒連絡管１４から導入される熱源側冷媒の放熱器として機能して、第２利用側熱交換器１０１ａにおいて放熱した熱源側冷媒を液冷媒連絡管１３に導出し、第２利用側熱交換器１０１ａにおける熱源側冷媒の放熱によって空気媒体を加熱する暖房運転を行うことが可能になっている。 The second usage side flow rate adjustment valve 102a is an electric expansion valve capable of varying the flow rate of the heat source side refrigerant flowing through the second usage side heat exchanger 101a by performing opening degree control. It is provided in the refrigerant pipe 103a.
Thus, the second usage unit 10a causes the second usage-side heat exchanger 101a to function as an evaporator of the heat-source-side refrigerant introduced from the liquid refrigerant communication tube 13 when the heat-source-side switching mechanism 23 is in the heat-source-side heat radiation operation state. Thus, the cooling operation in which the heat source side refrigerant evaporated in the second usage side heat exchanger 101a is led out to the gas refrigerant communication tube 14 and the air medium is cooled by the evaporation of the heat source side refrigerant in the second usage side heat exchanger 101a. And the second use side heat exchanger 101a functions as a heat source side refrigerant radiator introduced from the gas refrigerant communication tube 14 in the heat source side evaporation operation state when the heat source side switching mechanism 23 is The heat source side refrigerant radiated in the second usage side heat exchanger 101a is led out to the liquid refrigerant communication tube 13, and the air medium is released by the heat dissipation of the heat source side refrigerant in the second usage side heat exchanger 101a. It becomes possible to perform the heating operation for heating.
　また、第２利用ユニット１０ａには、各種のセンサが設けられている。具体的には、第２利用ユニット１０ａには、室内温度Ｔｒを検出する室内温度センサ１０７ａが設けられている。
　尚、第２利用ユニット１０ｂの構成は、第２利用ユニット１０ａの構成と同様であるため、第２利用ユニット１０ｂの構成については、第２利用ユニット１０ａの各部を示す符号の添字「ａ」の代わりに添字「ｂ」を付して、各部の説明を省略する。
　－第１利用側コントローラ－
　また、ヒートポンプシステム１には、第１利用ユニット４ａの給湯運転の制御設定や制御指令を行う第１利用側コントローラ７７ａが設けられており、ここでは、第１利用ユニット４ａに通信可能に接続されている。 Various sensors are provided in the second usage unit 10a. Specifically, the second usage unit 10a is provided with an indoor temperature sensor 107a that detects the indoor temperature Tr.
Since the configuration of the second usage unit 10b is the same as the configuration of the second usage unit 10a, the configuration of the second usage unit 10b is indicated by the subscript “a” indicating the parts of the second usage unit 10a. Instead, the subscript “b” is added and description of each part is omitted.
-First user side controller-
In addition, the heat pump system 1 is provided with a first usage-side controller 77a that performs control settings and control commands for hot water supply operation of the first usage unit 4a. Here, the first usage unit 4a is communicably connected. ing.
　－第２利用側コントローラ－
　また、ヒートポンプシステム１には、第２利用ユニット１０ａの冷房運転や暖房運転の制御設定や運転指令を行う第２利用側コントローラ１０８ａが設けられており、第２利用ユニット１０ｂの冷房運転や暖房運転の制御設定や運転指令を行う第２利用側コントローラ１０８ｂが設けられており、ここでは、第２利用ユニット１０ａ、１０ｂに通信可能に接続されている。
　また、ヒートポンプシステム１には、第１及び第２利用側コントローラの設定や指令によって、以下の運転や各種制御を行う制御部（図示せず）が設けられている。
　＜動作＞
　次に、ヒートポンプシステム１の動作について説明する。 -Second user controller-
Further, the heat pump system 1 is provided with a second usage-side controller 108a that performs control settings and operation commands for the cooling operation and heating operation of the second usage unit 10a, and the cooling operation and heating operation of the second usage unit 10b. The second usage side controller 108b for performing the control setting and the operation command is provided, and is connected to the second usage units 10a and 10b so as to be communicable.
Further, the heat pump system 1 is provided with a control unit (not shown) that performs the following operation and various controls according to the settings and commands of the first and second usage-side controllers.
<Operation>
Next, the operation of the heat pump system 1 will be described.
　ヒートポンプシステム１の運転としては、第１利用ユニット４ａの給湯運転（すなわち、貯湯ユニット８ａ及び／又は温水暖房ユニット９ａの運転）のみを行う給湯運転と、第２利用ユニット１０ａ及び／又は第２利用ユニット１０ｂの冷房運転のみを行う冷房運転と、第２利用ユニット１０ａ及び／又は第２利用ユニット１０ｂの暖房運転のみを行う暖房運転と、第１利用ユニット４ａの給湯運転を行うとともに第２利用ユニット１０ａ及び／又は第２利用ユニット１０ｂの暖房運転を行う給湯暖房運転とがある。
　以下、ヒートポンプシステム１の４つの運転における動作について説明する。
　－給湯運転－
　第１利用ユニット４ａの給湯運転のみを行う場合には、熱源側冷媒回路２０においては、熱源側切換機構２３が熱源側蒸発運転状態（図１の熱源側切換機構２３の破線で示された状態）に切り換えられ、吸入戻し膨張弁２６ａ及び第２利用側流量調節弁１０２ａ、１０２ｂが閉止された状態になる。また、水媒体回路８０ａにおいては、水媒体切換機構１６１ａが貯湯ユニット８ａ及び／又は温水暖房ユニット９ａに水媒体を供給する状態に切り換えられる。ここでは、第２利用側コントローラ１０８ａ、１０８ｂのうちの１つによって、温調モードとしての熱源側切換機構２３の切換状態を熱源側蒸発運転状態に切り換えた上で、第１利用側コントローラ７７ａの運転指令によって、第１利用ユニット４ａ（及び、貯湯ユニット８ａ及び／又は温水暖房ユニット９ａ）の運転（給湯運転）が行われる。 The operation of the heat pump system 1 includes a hot water supply operation in which only the hot water supply operation of the first usage unit 4a (that is, the operation of the hot water storage unit 8a and / or the hot water heating unit 9a), the second usage unit 10a and / or the second usage. A cooling operation that performs only the cooling operation of the unit 10b, a heating operation that performs only the heating operation of the second usage unit 10a and / or the second usage unit 10b, and a hot water supply operation of the first usage unit 4a and the second usage unit 10a and / or a hot water supply / heating operation for performing the heating operation of the second usage unit 10b.
Hereinafter, operations in the four operations of the heat pump system 1 will be described.
-Hot water operation-
When only the hot water supply operation of the first usage unit 4a is performed, in the heat source side refrigerant circuit 20, the heat source side switching mechanism 23 is in the heat source side evaporation operation state (the state indicated by the broken line of the heat source side switching mechanism 23 in FIG. 1). ), And the suction return expansion valve 26a and the second usage-side flow rate adjustment valves 102a and 102b are closed. In the aqueous medium circuit 80a, the aqueous medium switching mechanism 161a is switched to a state in which the aqueous medium is supplied to the hot water storage unit 8a and / or the hot water heating unit 9a. Here, the switching state of the heat source side switching mechanism 23 as the temperature control mode is switched to the heat source side evaporation operation state by one of the second usage side controllers 108a and 108b, and then the first usage side controller 77a. The operation (hot water supply operation) of the first usage unit 4a (and the hot water storage unit 8a and / or the hot water heating unit 9a) is performed according to the operation command.
　このような状態の熱源側冷媒回路２０において、冷凍サイクルにおける低圧の熱源側冷媒は、熱源側吸入管２１ｃを通じて、熱源側圧縮機２１に吸入され、冷凍サイクルにおける高圧まで圧縮された後に、熱源側吐出管２１ｂに吐出される。熱源側吐出管２１ｂに吐出された高圧の熱源側冷媒は、油分離器２２ａにおいて冷凍機油が分離される。油分離器２２ａにおいて熱源側冷媒から分離された冷凍機油は、油戻し管２２ｂを通じて、熱源側吸入管２１ｃに戻される。冷凍機油が分離された高圧の熱源側冷媒は、熱源側切換機構２３、第２熱源側ガス冷媒管２３ｂ及びガス側閉鎖弁３０を通じて、熱源ユニット２からガス冷媒連絡管１４に送られる。
　ガス冷媒連絡管１４に送られた高圧の熱源側冷媒は、第１利用ユニット４ａに送られる。第１利用ユニット４ａに送られた高圧の熱源側冷媒は、第１利用側ガス冷媒管５４ａを通じて、第１利用側熱交換器４１ａに送られる。第１利用側熱交換器４１ａに送られた高圧の熱源側冷媒は、第１利用側熱交換器４１ａにおいて、循環ポンプ４３ａによって水媒体回路８０ａを循環する水媒体と熱交換を行って放熱する。第１利用側熱交換器４１ａにおいて放熱した高圧の熱源側冷媒は、第１利用側流量調節弁４２ａ及び第１利用側液冷媒管４５ａを通じて、第１利用ユニット４ａから液冷媒連絡管１３に送られる。 In the heat source side refrigerant circuit 20 in such a state, the low pressure heat source side refrigerant in the refrigeration cycle is sucked into the heat source side compressor 21 through the heat source side suction pipe 21c and compressed to a high pressure in the refrigeration cycle, and then the heat source side refrigerant circuit 20 is cooled. It is discharged to the discharge pipe 21b. The high pressure heat source side refrigerant discharged to the heat source side discharge pipe 21b is separated from the refrigerating machine oil in the oil separator 22a. The refrigerating machine oil separated from the heat source side refrigerant in the oil separator 22a is returned to the heat source side suction pipe 21c through the oil return pipe 22b. The high-pressure heat source side refrigerant from which the refrigerating machine oil is separated is sent from the heat source unit 2 to the gas refrigerant communication tube 14 through the heat source side switching mechanism 23, the second heat source side gas refrigerant tube 23b, and the gas side shut-off valve 30.
The high-pressure heat-source-side refrigerant sent to the gas refrigerant communication tube 14 is sent to the first usage unit 4a. The high-pressure heat-source-side refrigerant sent to the first usage unit 4a is sent to the first usage-side heat exchanger 41a through the first usage-side gas refrigerant tube 54a. The high-pressure heat-source-side refrigerant sent to the first usage-side heat exchanger 41a radiates heat by exchanging heat with the aqueous medium circulating in the aqueous-medium circuit 80a by the circulation pump 43a in the first usage-side heat exchanger 41a. . The high-pressure heat-source-side refrigerant radiated in the first usage-side heat exchanger 41a is sent from the first usage unit 4a to the liquid refrigerant communication tube 13 through the first usage-side flow rate adjustment valve 42a and the first usage-side liquid refrigerant tube 45a. It is done.
　液冷媒連絡管１３に送られた熱源側冷媒は、熱源ユニット２に送られる。熱源ユニット２に送られた熱源側冷媒は、液側閉鎖弁２９を通じて、過冷却器２７に送られる。過冷却器２７に送られた熱源側冷媒は、吸入戻し管２６に熱源側冷媒が流れていないため、熱交換を行うことなく、熱源側膨張弁２５に送られる。熱源側膨張弁２５に送られた熱源側冷媒は、熱源側膨張弁２５において減圧されて、低圧の気液二相状態になり、熱源側液冷媒管２４ａを通じて、熱源側熱交換器２４に送られる。熱源側熱交換器２４に送られた低圧の冷媒は、熱源側熱交換器２４において、熱源側ファン３２によって供給される室外空気と熱交換を行って蒸発する。熱源側熱交換器２４において蒸発した低圧の熱源側冷媒は、第１熱源側ガス冷媒管２３ａ及び熱源側切換機構２３を通じて、熱源側アキュムレータ２８に送られる。熱源側アキュムレータ２８に送られた低圧の熱源側冷媒は、熱源側吸入管２１ｃを通じて、再び、熱源側圧縮機２１に吸入される。 The heat source side refrigerant sent to the liquid refrigerant communication tube 13 is sent to the heat source unit 2. The heat source side refrigerant sent to the heat source unit 2 is sent to the supercooler 27 through the liquid side shut-off valve 29. The heat source side refrigerant sent to the subcooler 27 is sent to the heat source side expansion valve 25 without performing heat exchange because the heat source side refrigerant does not flow through the suction return pipe 26. The heat source side refrigerant sent to the heat source side expansion valve 25 is depressurized by the heat source side expansion valve 25 to be in a low-pressure gas-liquid two-phase state, and sent to the heat source side heat exchanger 24 through the heat source side liquid refrigerant tube 24a. It is done. The low-pressure refrigerant sent to the heat source side heat exchanger 24 evaporates by exchanging heat with outdoor air supplied by the heat source side fan 32 in the heat source side heat exchanger 24. The low-pressure heat source side refrigerant evaporated in the heat source side heat exchanger 24 is sent to the heat source side accumulator 28 through the first heat source side gas refrigerant tube 23a and the heat source side switching mechanism 23. The low-pressure heat source side refrigerant sent to the heat source side accumulator 28 is again sucked into the heat source side compressor 21 through the heat source side suction pipe 21c.
　一方、水媒体回路８０ａにおいては、第１利用側熱交換器４１ａにおける熱源側冷媒の放熱によって水媒体回路８０ａを循環する水媒体が加熱される。第１利用側熱交換器４１ａにおいて加熱された水媒体は、第１利用側水出口管４８ａを通じて、循環ポンプ４３ａに吸入され、昇圧された後に、第１利用ユニット４ａから水媒体連絡管１６ａに送られる。水媒体連絡管１６ａに送られた水媒体は、水媒体側切換機構１６１ａを通じて、貯湯ユニット８ａ及び／又は温水暖房ユニット９ａに送られる。貯湯ユニット８ａに送られた水媒体は、熱交換コイル８２ａにおいて貯湯タンク８１ａ内の水媒体と熱交換を行って放熱し、これにより、貯湯タンク８１ａ内の水媒体を加熱する。温水暖房ユニット９ａに送られた水媒体は、熱交換パネル９１ａにおいて放熱し、これにより、室内の壁際等を加熱したり室内の床を加熱する。 On the other hand, in the aqueous medium circuit 80a, the aqueous medium circulating in the aqueous medium circuit 80a is heated by the heat radiation of the heat source side refrigerant in the first usage-side heat exchanger 41a. The aqueous medium heated in the first usage-side heat exchanger 41a is sucked into the circulation pump 43a through the first usage-side water outlet pipe 48a, and after the pressure is increased, from the first usage unit 4a to the aqueous medium communication pipe 16a. Sent. The aqueous medium sent to the aqueous medium communication pipe 16a is sent to the hot water storage unit 8a and / or the hot water heating unit 9a through the aqueous medium side switching mechanism 161a. The aqueous medium sent to the hot water storage unit 8a exchanges heat with the aqueous medium in the hot water storage tank 81a in the heat exchange coil 82a to radiate heat, thereby heating the aqueous medium in the hot water storage tank 81a. The aqueous medium sent to the hot water heating unit 9a dissipates heat in the heat exchange panel 91a, thereby heating the indoor wall or the like or heating the indoor floor.
　このようにして、第１利用ユニット４ａの給湯運転のみを行う給湯運転における動作が行われる。
　－冷房運転－
　第２利用ユニット１０ａ及び／又は第２利用ユニット１０ｂの冷房運転のみを行う場合には、熱源側冷媒回路２０においては、熱源側切換機構２３が熱源側放熱運転状態（図１の熱源側切換機構２３の実線で示された状態）に切り換えられ、第１利用側流量調節弁４２ａが閉止された状態になる。ここでは、第２利用側コントローラ１０８ａ、１０８ｂのうちの１つによって、温調モードとしての熱源側切換機構２３の切換状態を熱源側放熱運転状態に切り換えた上で、第２利用側コントローラ１０８ａ及び／又は第２利用側コントローラ１０８ｂの運転指令によって、第２利用ユニット１０ａ及び／又は第２利用ユニット１０ｂの運転（冷房運転）が行われる。 Thus, the operation | movement in the hot water supply operation which performs only the hot water supply operation of the 1st utilization unit 4a is performed.
-Cooling operation-
When only the cooling operation of the second usage unit 10a and / or the second usage unit 10b is performed, in the heat source side refrigerant circuit 20, the heat source side switching mechanism 23 is in the heat source side heat dissipation operation state (the heat source side switching mechanism in FIG. 1). 23, the first use side flow rate adjustment valve 42a is closed. Here, after switching the switching state of the heat source side switching mechanism 23 as the temperature control mode to the heat source side heat radiation operation state by one of the second usage side controllers 108a and 108b, the second usage side controller 108a and The operation (cooling operation) of the second usage unit 10a and / or the second usage unit 10b is performed according to the operation command of the second usage side controller 108b.
　このような状態の熱源側冷媒回路２０において、冷凍サイクルにおける低圧の熱源側冷媒は、熱源側吸入管２１ｃを通じて、熱源側圧縮機２１に吸入され、冷凍サイクルにおける高圧まで圧縮された後に、熱源側吐出管２１ｂに吐出される。熱源側吐出管２１ｂに吐出された高圧の熱源側冷媒は、油分離器２２ａにおいて冷凍機油が分離される。油分離器２２ａにおいて熱源側冷媒から分離された冷凍機油は、油戻し管２２ｂを通じて、熱源側吸入管２１ｃに戻される。冷凍機油が分離された高圧の熱源側冷媒は、熱源側切換機構２３及び第１熱源側ガス冷媒管２３ａを通じて、熱源側熱交換器２４に送られる。熱源側熱交換器２４に送られた高圧の熱源側冷媒は、熱源側熱交換器２４において、熱源側ファン３２によって供給される室外空気と熱交換を行って放熱する。熱源側熱交換器２４において放熱した高圧の熱源側冷媒は、熱源側膨張弁２５を通じて、過冷却器２７に送られる。過冷却器２７に送られた熱源側冷媒は、熱源側液冷媒管２４ａから吸入戻し管２６に分岐された熱源側冷媒と熱交換を行って過冷却状態になるように冷却される。吸入戻し管２６を流れる熱源側冷媒は、熱源側吸入管２１ｃに戻される。過冷却器２７において冷却された熱源側冷媒は、熱源側液冷媒管２４ａ及び液側閉鎖弁２９を通じて、熱源ユニット２から液冷媒連絡管１３に送られる。 In the heat source side refrigerant circuit 20 in such a state, the low pressure heat source side refrigerant in the refrigeration cycle is sucked into the heat source side compressor 21 through the heat source side suction pipe 21c and compressed to a high pressure in the refrigeration cycle, and then the heat source side refrigerant circuit 20 is cooled. It is discharged to the discharge pipe 21b. The high pressure heat source side refrigerant discharged to the heat source side discharge pipe 21b is separated from the refrigerating machine oil in the oil separator 22a. The refrigerating machine oil separated from the heat source side refrigerant in the oil separator 22a is returned to the heat source side suction pipe 21c through the oil return pipe 22b. The high-pressure heat-source-side refrigerant from which the refrigeration oil is separated is sent to the heat-source-side heat exchanger 24 through the heat-source-side switching mechanism 23 and the first heat-source-side gas refrigerant tube 23a. The high-pressure heat-source-side refrigerant sent to the heat-source-side heat exchanger 24 radiates heat by exchanging heat with outdoor air supplied by the heat-source-side fan 32 in the heat source-side heat exchanger 24. The high-pressure heat-source-side refrigerant that has radiated heat in the heat-source-side heat exchanger 24 is sent to the supercooler 27 through the heat-source-side expansion valve 25. The heat-source-side refrigerant sent to the subcooler 27 is cooled so as to be in a supercooled state by exchanging heat with the heat-source-side refrigerant branched from the heat source-side liquid refrigerant tube 24a to the suction return tube 26. The heat source side refrigerant flowing through the suction return pipe 26 is returned to the heat source side suction pipe 21c. The heat source side refrigerant cooled in the subcooler 27 is sent from the heat source unit 2 to the liquid refrigerant communication tube 13 through the heat source side liquid refrigerant tube 24a and the liquid side shut-off valve 29.
　液冷媒連絡管１３に送られた高圧の熱源側冷媒は、第２利用ユニット１０ａ、１０ｂ（ここでは、第２利用ユニット１０ａ、１０ｂの両方を冷房運転するものとして説明する）に送られる。第２利用ユニット１０ａ、１０ｂに送られた高圧の熱源側冷媒は、第２利用側流量調節弁１０２ａ、１０２ｂに送られる。第２利用側流量調節弁１０２ａ、１０２ｂに送られた高圧の熱源側冷媒は、第２利用側流量調節弁１０２ａ、１０２ｂにおいて減圧されて、低圧の気液二相状態になり、第２利用側液冷媒管１０３ａ、１０３ｂを通じて、第２利用側熱交換器１０１ａ、１０１ｂに送られる。第２利用側熱交換器１０１ａ、１０１０ｂに送られた低圧の熱源側冷媒は、第２利用側熱交換器１０１ａ、１０１ｂにおいて、利用側ファン１０５ａ、１０５ｂによって供給される空気媒体と熱交換を行って蒸発し、これにより、室内の冷房を行う。第２利用側熱交換器１０１ａ、１０１ｂにおいて蒸発した低圧の熱源側冷媒は、第２利用側ガス冷媒管１０４ａ、１０４ｂを通じて、第２利用ユニット１０ａ、１０ｂからガス冷媒連絡管１４に送られる。 The high-pressure heat-source-side refrigerant sent to the liquid refrigerant communication tube 13 is sent to the second usage units 10a and 10b (here, it is assumed that both the second usage units 10a and 10b are in cooling operation). The high-pressure heat-source-side refrigerant sent to the second usage units 10a and 10b is sent to the second usage-side flow rate adjustment valves 102a and 102b. The high-pressure heat-source-side refrigerant sent to the second usage-side flow rate adjustment valves 102a and 102b is depressurized by the second usage-side flow rate adjustment valves 102a and 102b to be in a low-pressure gas-liquid two-phase state. The liquid refrigerant pipes 103a and 103b are sent to the second usage side heat exchangers 101a and 101b. The low-pressure heat-source-side refrigerant sent to the second usage-side heat exchangers 101a and 1010b exchanges heat with the air medium supplied by the usage- side fans 105a and 105b in the second usage- side heat exchangers 101a and 101b. Evaporates, thereby cooling the room. The low-pressure heat-source-side refrigerant evaporated in the second usage- side heat exchangers 101a and 101b is sent from the second usage units 10a and 10b to the gas refrigerant communication tube 14 through the second usage-side gas refrigerant tubes 104a and 104b.
　ガス冷媒連絡管１４に送られた低圧の熱源側冷媒は、熱源ユニット２に送られる。熱源ユニット２に送られた低圧の熱源側冷媒は、ガス側閉鎖弁３０、第２熱源側ガス冷媒管２３ｂ及び熱源側切換機構２３を通じて、熱源側アキュムレータ２８に送られる。熱源側アキュムレータ２８に送られた低圧の熱源側冷媒は、熱源側吸入管２１ｃを通じて、再び、熱源側圧縮機２１に吸入される。
　このようにして、第２利用ユニット１０ａ及び／又は第２利用ユニット１０ｂの冷房運転のみを行う冷房運転における動作が行われる。
　－暖房運転－
　第２利用ユニット１０ａ及び／又は第２利用ユニット１０ｂの暖房運転のみを行う場合には、熱源側冷媒回路２０においては、熱源側切換機構２３が熱源側放熱運転状態（図１の熱源側切換機構２３の破線で示された状態）に切り換えられ、吸入戻し膨張弁２６ａ及び第１利用側流量調節弁４２ａが閉止された状態になる。ここでは、第２利用側コントローラ１０８ａ、１０８ｂのうちの１つによって、温調モードとしての熱源側切換機構２３の切換状態を熱源側蒸発運転状態に切り換えた上で、第２利用側コントローラ１０８ａ及び／又は第２利用側コントローラ１０８ｂの運転指令によって、第２利用ユニット１０ａ及び／又は第２利用ユニット１０ｂの運転（暖房運転）が行われる。 The low-pressure heat source side refrigerant sent to the gas refrigerant communication tube 14 is sent to the heat source unit 2. The low-pressure heat source side refrigerant sent to the heat source unit 2 is sent to the heat source side accumulator 28 through the gas side shut-off valve 30, the second heat source side gas refrigerant tube 23b, and the heat source side switching mechanism 23. The low-pressure heat source side refrigerant sent to the heat source side accumulator 28 is again sucked into the heat source side compressor 21 through the heat source side suction pipe 21c.
Thus, the operation | movement in the air_conditionaing | cooling operation which performs only the air_conditionaing | cooling operation of the 2nd usage unit 10a and / or the 2nd usage unit 10b is performed.
-Heating operation-
When only the heating operation of the second usage unit 10a and / or the second usage unit 10b is performed, in the heat source side refrigerant circuit 20, the heat source side switching mechanism 23 is in the heat source side heat dissipation operation state (the heat source side switching mechanism in FIG. 1). 23, the suction return expansion valve 26a and the first usage-side flow rate adjustment valve 42a are closed. Here, after switching the switching state of the heat source side switching mechanism 23 as the temperature control mode to the heat source side evaporation operation state by one of the second usage side controllers 108a and 108b, the second usage side controller 108a and The operation (heating operation) of the second usage unit 10a and / or the second usage unit 10b is performed according to the operation command of the second usage side controller 108b.
　このような状態の熱源側冷媒回路２０において、冷凍サイクルにおける低圧の熱源側冷媒は、熱源側吸入管２１ｃを通じて、熱源側圧縮機２１に吸入され、冷凍サイクルにおける高圧まで圧縮された後に、熱源側吐出管２１ｂに吐出される。熱源側吐出管２１ｂに吐出された高圧の熱源側冷媒は、油分離器２２ａにおいて冷凍機油が分離される。油分離器２２ａにおいて熱源側冷媒から分離された冷凍機油は、油戻し管２２ｂを通じて、熱源側吸入管２１ｃに戻される。冷凍機油が分離された高圧の熱源側冷媒は、熱源側切換機構２３、第２熱源側ガス冷媒管２３ｂ及びガス側閉鎖弁３０を通じて、熱源ユニット２からガス冷媒連絡管１４に送られる。
　ガス冷媒連絡管１４に送られた高圧の熱源側冷媒は、第２利用ユニット１０ａ、１０ｂ（ここでは、第２利用ユニット１０ａ、１０ｂの両方を暖房運転するものとして説明する）に送られる。第２利用ユニット１０ａ、１０ｂに送られた高圧の熱源側冷媒は、第２利用側ガス冷媒管１０４ａ、１０４ｂを通じて、第２利用側熱交換器１０１ａ、１０１ｂに送られる。第２利用側熱交換器１０１ａ、１０１ｂに送られた高圧の熱源側冷媒は、第２利用側熱交換器１０１ａ、１０１ｂにおいて、利用側ファン１０５ａ、１０５ｂによって供給される空気媒体と熱交換を行って放熱し、これにより、室内の暖房を行う。第２利用側熱交換器１０１ａ、１０１ｂにおいて放熱した高圧の熱源側冷媒は、第２利用側流量調節弁１０２ａ、１０２ｂ及び第２利用側液冷媒管１０３ａ、１０３ｂを通じて、第２利用ユニット１０ａ、１０ｂから液冷媒連絡管１３に送られる。 In the heat source side refrigerant circuit 20 in such a state, the low pressure heat source side refrigerant in the refrigeration cycle is sucked into the heat source side compressor 21 through the heat source side suction pipe 21c and compressed to a high pressure in the refrigeration cycle, and then the heat source side refrigerant circuit 20 is cooled. It is discharged to the discharge pipe 21b. The high pressure heat source side refrigerant discharged to the heat source side discharge pipe 21b is separated from the refrigerating machine oil in the oil separator 22a. The refrigerating machine oil separated from the heat source side refrigerant in the oil separator 22a is returned to the heat source side suction pipe 21c through the oil return pipe 22b. The high-pressure heat source side refrigerant from which the refrigerating machine oil is separated is sent from the heat source unit 2 to the gas refrigerant communication tube 14 through the heat source side switching mechanism 23, the second heat source side gas refrigerant tube 23b, and the gas side shut-off valve 30.
The high-pressure heat-source-side refrigerant sent to the gas refrigerant communication tube 14 is sent to the second usage units 10a and 10b (here, it is assumed that both the second usage units 10a and 10b are operated for heating). The high-pressure heat-source-side refrigerant sent to the second usage units 10a, 10b is sent to the second usage- side heat exchangers 101a, 101b through the second usage-side gas refrigerant tubes 104a, 104b. The high-pressure heat-source-side refrigerant sent to the second usage- side heat exchangers 101a and 101b exchanges heat with the air medium supplied by the usage- side fans 105a and 105b in the second usage- side heat exchangers 101a and 101b. To dissipate heat, thereby heating the room. The high-pressure heat-source-side refrigerant radiated in the second usage- side heat exchangers 101a and 101b passes through the second usage-side flow rate adjustment valves 102a and 102b and the second usage-side liquid refrigerant tubes 103a and 103b, and the second usage units 10a and 10b. To the liquid refrigerant communication tube 13.
　液冷媒連絡管１３に送られた熱源側冷媒は、熱源ユニット２に送られる。熱源ユニット２に送られた熱源側冷媒は、液側閉鎖弁２９を通じて、過冷却器２７に送られる。過冷却器２７に送られた熱源側冷媒は、吸入戻し管２６に熱源側冷媒が流れていないため、熱交換を行うことなく、熱源側膨張弁２５に送られる。熱源側膨張弁２５に送られた熱源側冷媒は、熱源側膨張弁２５において減圧されて、低圧の気液二相状態になり、熱源側液冷媒管２４ａを通じて、熱源側熱交換器２４に送られる。熱源側熱交換器２４に送られた低圧の冷媒は、熱源側熱交換器２４において、熱源側ファン３２によって供給される室外空気と熱交換を行って蒸発する。熱源側熱交換器２４において蒸発した低圧の熱源側冷媒は、第１熱源側ガス冷媒管２３ａ及び熱源側切換機構２３を通じて、熱源側アキュムレータ２８に送られる。熱源側アキュムレータ２８に送られた低圧の熱源側冷媒は、熱源側吸入管２１ｃを通じて、再び、熱源側圧縮機２１に吸入される。 The heat source side refrigerant sent to the liquid refrigerant communication tube 13 is sent to the heat source unit 2. The heat source side refrigerant sent to the heat source unit 2 is sent to the supercooler 27 through the liquid side shut-off valve 29. The heat source side refrigerant sent to the subcooler 27 is sent to the heat source side expansion valve 25 without performing heat exchange because the heat source side refrigerant does not flow through the suction return pipe 26. The heat source side refrigerant sent to the heat source side expansion valve 25 is depressurized by the heat source side expansion valve 25 to be in a low-pressure gas-liquid two-phase state, and sent to the heat source side heat exchanger 24 through the heat source side liquid refrigerant tube 24a. It is done. The low-pressure refrigerant sent to the heat source side heat exchanger 24 evaporates by exchanging heat with outdoor air supplied by the heat source side fan 32 in the heat source side heat exchanger 24. The low-pressure heat source side refrigerant evaporated in the heat source side heat exchanger 24 is sent to the heat source side accumulator 28 through the first heat source side gas refrigerant tube 23a and the heat source side switching mechanism 23. The low-pressure heat source side refrigerant sent to the heat source side accumulator 28 is again sucked into the heat source side compressor 21 through the heat source side suction pipe 21c.
　このようにして、第２利用ユニット１０ａ及び／又は第２利用ユニット１０ｂの暖房運転のみを行う暖房運転における動作が行われる。
　－給湯暖房運転－
　第１利用ユニット４ａの給湯運転を行うとともに第２利用ユニット１０ａ及び／又は第２利用ユニット１０ｂの暖房運転を行う場合には、熱源側冷媒回路２０においては、熱源側切換機構２３が熱源側蒸発運転状態（図１の熱源側切換機構２３の破線で示された状態）に切り換えられ、吸入戻し膨張弁２６ａが閉止された状態になる。また、水媒体回路８０ａにおいては、水媒体切換機構１６１ａが貯湯ユニット８ａ及び／又は温水暖房ユニット９ａに水媒体を供給する状態に切り換えられる。ここでは、第２利用側コントローラ１０８ａ、１０８ｂのうちの１つによって、温調モードとしての熱源側切換機構２３の切換状態を熱源側蒸発運転状態に切り換えた上で、第１利用側コントローラ７７ａの運転指令によって、第１利用ユニット４ａ（及び、貯湯ユニット８ａ及び／又は温水暖房ユニット９ａ）の運転（給湯運転）と、第２利用側コントローラ１０８ａ及び／又は第２利用側コントローラ１０８ｂの運転指令によって、第２利用ユニット１０ａ及び／又は第２利用ユニット１０ｂの運転（暖房運転）が行われる。 Thus, the operation | movement in the heating operation which performs only the heating operation of the 2nd usage unit 10a and / or the 2nd usage unit 10b is performed.
-Hot water heater operation-
When the hot water supply operation of the first usage unit 4a and the heating operation of the second usage unit 10a and / or the second usage unit 10b are performed, in the heat source side refrigerant circuit 20, the heat source side switching mechanism 23 is heat source side evaporation. The operation state is switched to the operation state (the state indicated by the broken line of the heat source side switching mechanism 23 in FIG. 1), and the suction return expansion valve 26a is closed. In the aqueous medium circuit 80a, the aqueous medium switching mechanism 161a is switched to a state in which the aqueous medium is supplied to the hot water storage unit 8a and / or the hot water heating unit 9a. Here, the switching state of the heat source side switching mechanism 23 as the temperature control mode is switched to the heat source side evaporation operation state by one of the second usage side controllers 108a and 108b, and then the first usage side controller 77a. According to the operation command, the operation (hot water supply operation) of the first usage unit 4a (and the hot water storage unit 8a and / or the hot water heating unit 9a) and the operation command of the second usage side controller 108a and / or the second usage side controller 108b The operation (heating operation) of the second usage unit 10a and / or the second usage unit 10b is performed.
　このような状態の熱源側冷媒回路２０において、冷凍サイクルにおける低圧の熱源側冷媒は、熱源側吸入管２１ｃを通じて、熱源側圧縮機２１に吸入され、冷凍サイクルにおける高圧まで圧縮された後に、熱源側吐出管２１ｂに吐出される。熱源側吐出管２１ｂに吐出された高圧の熱源側冷媒は、油分離器２２ａにおいて冷凍機油が分離される。油分離器２２ａにおいて熱源側冷媒から分離された冷凍機油は、油戻し管２２ｂを通じて、熱源側吸入管２１ｃに戻される。冷凍機油が分離された高圧の熱源側冷媒は、熱源側切換機構２３、第２熱源側ガス冷媒管２３ｂ及びガス側閉鎖弁３０を通じて、熱源ユニット２からガス冷媒連絡管１４に送られる。
　ガス冷媒連絡管１４に送られた高圧の熱源側冷媒は、第１利用ユニット４ａ及び第２利用ユニット１０ａ、１０ｂ（ここでは、第２利用ユニット１０ａ、１０ｂの両方を暖房運転するものとして説明する）に送られる。 In the heat source side refrigerant circuit 20 in such a state, the low pressure heat source side refrigerant in the refrigeration cycle is sucked into the heat source side compressor 21 through the heat source side suction pipe 21c and compressed to a high pressure in the refrigeration cycle, and then the heat source side refrigerant circuit 20 is cooled. It is discharged to the discharge pipe 21b. The high pressure heat source side refrigerant discharged to the heat source side discharge pipe 21b is separated from the refrigerating machine oil in the oil separator 22a. The refrigerating machine oil separated from the heat source side refrigerant in the oil separator 22a is returned to the heat source side suction pipe 21c through the oil return pipe 22b. The high-pressure heat source side refrigerant from which the refrigerating machine oil is separated is sent from the heat source unit 2 to the gas refrigerant communication tube 14 through the heat source side switching mechanism 23, the second heat source side gas refrigerant tube 23b, and the gas side shut-off valve 30.
The high-pressure heat-source-side refrigerant sent to the gas refrigerant communication tube 14 will be described on the assumption that the first usage unit 4a and the second usage units 10a and 10b (here, both the second usage units 10a and 10b are heated). ).
　第２利用ユニット１０ａ、１０ｂに送られた高圧の熱源側冷媒は、第２利用側ガス冷媒管１０４ａ、１０４ｂを通じて、第２利用側熱交換器１０１ａ、１０１ｂに送られる。第２利用側熱交換器１０１ａ、１０１ｂに送られた高圧の熱源側冷媒は、第２利用側熱交換器１０１ａ、１０１ｂにおいて、利用側ファン１０５ａ、１０５ｂによって供給される空気媒体と熱交換を行って放熱し、これにより、室内の暖房を行う。第２利用側熱交換器１０１ａ、１０１ｂにおいて放熱した高圧の熱源側冷媒は、第２利用側流量調節弁１０２ａ、１０２ｂ及び第２利用側液冷媒管１０３ａ、１０３ｂを通じて、第２利用ユニット１０ａ、１０ｂから液冷媒連絡管１３に送られる。
　第１利用ユニット４ａに送られた高圧の熱源側冷媒は、第１利用側ガス冷媒管５４ａを通じて、第１利用側熱交換器４１ａに送られる。第１利用側熱交換器４１ａに送られた高圧の熱源側冷媒は、第１利用側熱交換器４１ａにおいて、利用側冷媒回路４０ａを循環する冷凍サイクルにおける低圧の利用側冷媒と熱交換を行って放熱する。第１利用側熱交換器４１ａにおいて放熱した高圧の熱源側冷媒は、第１利用側流量調節弁４２ａ及び第１利用側液冷媒管４５ａを通じて、第１利用ユニット４ａから液冷媒連絡管１３に送られる。 The high-pressure heat-source-side refrigerant sent to the second usage units 10a, 10b is sent to the second usage- side heat exchangers 101a, 101b through the second usage-side gas refrigerant tubes 104a, 104b. The high-pressure heat-source-side refrigerant sent to the second usage- side heat exchangers 101a and 101b exchanges heat with the air medium supplied by the usage- side fans 105a and 105b in the second usage- side heat exchangers 101a and 101b. To dissipate heat, thereby heating the room. The high-pressure heat-source-side refrigerant radiated in the second usage- side heat exchangers 101a and 101b passes through the second usage-side flow rate adjustment valves 102a and 102b and the second usage-side liquid refrigerant tubes 103a and 103b, and the second usage units 10a and 10b. To the liquid refrigerant communication tube 13.
The high-pressure heat-source-side refrigerant sent to the first usage unit 4a is sent to the first usage-side heat exchanger 41a through the first usage-side gas refrigerant tube 54a. The high-pressure heat-source-side refrigerant sent to the first usage-side heat exchanger 41a exchanges heat with the low-pressure usage-side refrigerant in the refrigeration cycle circulating in the usage-side refrigerant circuit 40a in the first usage-side heat exchanger 41a. To dissipate heat. The high-pressure heat-source-side refrigerant radiated in the first usage-side heat exchanger 41a is sent from the first usage unit 4a to the liquid refrigerant communication tube 13 through the first usage-side flow rate adjustment valve 42a and the first usage-side liquid refrigerant tube 45a. It is done.
　第２利用ユニット１０ａ、１０ｂ及び第１利用ユニット４ａから液冷媒連絡管１３に送られた熱源側冷媒は、液冷媒連絡管１３において合流して、熱源ユニット２に送られる。熱源ユニット２に送られた熱源側冷媒は、液側閉鎖弁２９を通じて、過冷却器２７に送られる。過冷却器２７に送られた熱源側冷媒は、吸入戻し管２６に熱源側冷媒が流れていないため、熱交換を行うことなく、熱源側膨張弁２５に送られる。熱源側膨張弁２５に送られた熱源側冷媒は、熱源側膨張弁２５において減圧されて、低圧の気液二相状態になり、熱源側液冷媒管２４ａを通じて、熱源側熱交換器２４に送られる。熱源側熱交換器２４に送られた低圧の冷媒は、熱源側熱交換器２４において、熱源側ファン３２によって供給される室外空気と熱交換を行って蒸発する。熱源側熱交換器２４において蒸発した低圧の熱源側冷媒は、第１熱源側ガス冷媒管２３ａ及び熱源側切換機構２３を通じて、熱源側アキュムレータ２８に送られる。熱源側アキュムレータ２８に送られた低圧の熱源側冷媒は、熱源側吸入管２１ｃを通じて、再び、熱源側圧縮機２１に吸入される。 The heat-source-side refrigerant sent from the second usage units 10a and 10b and the first usage unit 4a to the liquid refrigerant communication tube 13 merges in the liquid refrigerant communication tube 13 and is sent to the heat source unit 2. The heat source side refrigerant sent to the heat source unit 2 is sent to the supercooler 27 through the liquid side shut-off valve 29. The heat source side refrigerant sent to the subcooler 27 is sent to the heat source side expansion valve 25 without performing heat exchange because the heat source side refrigerant does not flow through the suction return pipe 26. The heat source side refrigerant sent to the heat source side expansion valve 25 is depressurized by the heat source side expansion valve 25 to be in a low-pressure gas-liquid two-phase state, and sent to the heat source side heat exchanger 24 through the heat source side liquid refrigerant tube 24a. It is done. The low-pressure refrigerant sent to the heat source side heat exchanger 24 evaporates by exchanging heat with outdoor air supplied by the heat source side fan 32 in the heat source side heat exchanger 24. The low-pressure heat source side refrigerant evaporated in the heat source side heat exchanger 24 is sent to the heat source side accumulator 28 through the first heat source side gas refrigerant tube 23a and the heat source side switching mechanism 23. The low-pressure heat source side refrigerant sent to the heat source side accumulator 28 is again sucked into the heat source side compressor 21 through the heat source side suction pipe 21c.
　一方、水媒体回路８０ａにおいては、第１利用側熱交換器４１ａにおける熱源側冷媒の放熱によって水媒体回路８０ａを循環する水媒体が加熱される。第１利用側熱交換器４１ａにおいて加熱された水媒体は、第１利用側水出口管４８ａを通じて、循環ポンプ４３ａに吸入され、昇圧された後に、第１利用ユニット４ａから水媒体連絡管１６ａに送られる。水媒体連絡管１６ａに送られた水媒体は、水媒体側切換機構１６１ａを通じて、貯湯ユニット８ａ及び／又は温水暖房ユニット９ａに送られる。貯湯ユニット８ａに送られた水媒体は、熱交換コイル８２ａにおいて貯湯タンク８１ａ内の水媒体と熱交換を行って放熱し、これにより、貯湯タンク８１ａ内の水媒体を加熱する。温水暖房ユニット９ａに送られた水媒体は、熱交換パネル９１ａにおいて放熱し、これにより、室内の壁際等を加熱したり室内の床を加熱する。 On the other hand, in the aqueous medium circuit 80a, the aqueous medium circulating in the aqueous medium circuit 80a is heated by the heat radiation of the heat source side refrigerant in the first usage-side heat exchanger 41a. The aqueous medium heated in the first usage-side heat exchanger 41a is drawn into the circulation pump 43a through the first usage-side water outlet pipe 48a, and after the pressure is increased, the first usage unit 4a supplies the aqueous medium communication pipe 16a. Sent. The aqueous medium sent to the aqueous medium communication pipe 16a is sent to the hot water storage unit 8a and / or the hot water heating unit 9a through the aqueous medium side switching mechanism 161a. The aqueous medium sent to the hot water storage unit 8a exchanges heat with the aqueous medium in the hot water storage tank 81a in the heat exchange coil 82a to radiate heat, thereby heating the aqueous medium in the hot water storage tank 81a. The aqueous medium sent to the hot water heating unit 9a dissipates heat in the heat exchange panel 91a, thereby heating the indoor wall or the like or heating the indoor floor.
　このようにして、第１利用ユニット４ａの給湯運転を行うとともに第２利用ユニット１０ａ及び／又は第２利用ユニット１０ｂの暖房運転を行う給湯暖房運転における動作が行われる。
　このように、このヒートポンプシステム１では、温調モードを熱源側放熱運転状態に切り換えたままでは、給湯運転や暖房運転を行うことができず、また、温調モードを熱源側蒸発運転状態に切り換えたままでは、冷房運転を行うことができない。すなわち、第１利用ユニット４ａ及び第２利用ユニット１０ａ、１０ｂにおいて所望の運転を行うためには、第１利用側コントローラ７７ａから第１利用ユニット４ａへの給湯運転の指令や第２利用側コントローラ１０８ａ、１０８ｂから第２利用ユニット１０ａ、１０ｂへの冷房運転又は暖房運転の指令だけでなく、第１及び第２利用ユニット４ａ、１０ａ、１０ｂに共通の熱源ユニット２における運転状態を決定する熱源側切換機構２３の切換状態である温調モードの切り換えが必要であり、その意味において、このヒートポンプシステム１は、第１利用ユニット４ａ及び第２利用ユニット１０ａ、１０ｂが個別に給湯運転、冷房運転又は暖房運転を選択して運転できないものとなっている。 In this way, the hot water supply operation of the first usage unit 4a and the heating operation of the second usage unit 10a and / or the second usage unit 10b are performed.
Thus, in this heat pump system 1, the hot water supply operation and the heating operation cannot be performed while the temperature control mode is switched to the heat source side heat radiation operation state, and the temperature control mode is switched to the heat source side evaporation operation state. If it is left alone, the cooling operation cannot be performed. That is, in order to perform a desired operation in the first usage unit 4a and the second usage unit 10a, 10b, a hot water supply operation command from the first usage side controller 77a to the first usage unit 4a or a second usage side controller 108a. , 108b to the second usage units 10a, 10b as well as cooling operation or heating operation commands, as well as heat source side switching that determines the operating state in the heat source unit 2 common to the first and second usage units 4a, 10a, 10b It is necessary to switch the temperature control mode, which is the switching state of the mechanism 23. In this sense, the heat pump system 1 includes the first usage unit 4a and the second usage unit 10a, 10b individually supplied with hot water supply operation, cooling operation or heating. You can not drive by selecting driving.
　－温調モード切り換え制御－
　しかし、ユーザーは、このヒートポンプシステム１を、単に、第２利用ユニット１０ａ、１０ｂによる冷暖房装置と第１利用ユニット４ａ等による給湯装置とが併存したしたものと受け取ってしまうため、温調モードの切り換えの必要性を認識できず、温調モードの切り換えを忘れたり、切り換えミスを生じるおそれがあり、また、温調モードの切り換えも煩雑である。
　そこで、このヒートポンプシステム１では、第２利用ユニット１０ａ、１０ｂに指令を行う第２利用側コントローラ１０８ａ、１０８ｂのうちの１つ（ここでは、第２利用側コントローラ１０８ａとする）が指令している温調モードとしての熱源側切換機構２３の切換状態とは異なる温調モードに切り換えて運転することが可能な温調モード切り換え制御を行うようにしている。 -Temperature control mode switching control-
However, since the user simply receives the heat pump system 1 as a combination of the air-conditioning / heating device using the second usage units 10a and 10b and the hot water supply device using the first usage unit 4a, the temperature control mode is switched. May not be recognized, and switching of the temperature control mode may be forgotten or a switching error may occur, and switching of the temperature control mode is complicated.
Therefore, in the heat pump system 1, one of the second usage- side controllers 108a and 108b that commands the second usage units 10a and 10b (here, the second usage-side controller 108a) commands the command. Temperature control mode switching control that can be operated by switching to a temperature control mode different from the switching state of the heat source side switching mechanism 23 as the temperature control mode is performed.
　以下に、このヒートポンプシステム１における温調モード切り換え制御の制御ロジックについて、図２を用いて説明する。この温調モード切り換え制御では、温調モードが熱源側放熱運転状態になっている（すなわち、第２利用ユニット１０ａ、１０ｂが冷房運転しているか、冷房運転を行っていなくても、第２利用側コントローラ１０８ａが温調モードを熱源側放熱運転状態になるように指令している）際において、第１利用側コントローラ７７ａから第１利用ユニット４ａに給湯運転が指令された場合（したがって、温調モードを熱源側蒸発運転状態しなければならない場合）には、温調モードを熱源側蒸発運転状態に切り換えて、第１利用ユニット４ａの給湯運転を行う運転である優先給湯運転（ステップＳ７～Ｓ９）が行われるようになっており、それ以外の場合には、指令されている温調モード（ここでは、第２利用側コントローラ１０８ａによって指令されている温調モード）における運転（ステップＳ１、Ｓ４）が行われるようになっている。 Hereinafter, the control logic of the temperature control mode switching control in the heat pump system 1 will be described with reference to FIG. In this temperature control mode switching control, the temperature control mode is in the heat source side heat radiation operation state (that is, even if the second usage units 10a and 10b are in the cooling operation or not in the cooling operation, the second usage When the side controller 108a commands the temperature control mode to enter the heat source side heat radiation operation state), when the hot water supply operation is commanded from the first usage side controller 77a to the first usage unit 4a (therefore, temperature regulation) When the mode must be the heat source side evaporation operation state), the priority hot water supply operation (steps S7 to S9), which is an operation for switching the temperature control mode to the heat source side evaporation operation state and performing the hot water supply operation of the first usage unit 4a. In other cases, the commanded temperature control mode (in this case, the second user side controller 108a specifies the temperature control mode). Operation in the temperature control mode) (step S1, S4) is to be carried out being.
　まず、ステップＳ１の運転状態、すなわち、第２利用側コントローラ１０８ａによって指令されている温調モードにおける運転（図２では、この運転を「優先給湯運転＝ＯＦＦ」とする）が継続しているものとする。
　次に、ステップＳ２において、条件Ａを満たすかどうかを判定する。ここで、条件Ａは、第２利用側コントローラ１０８ａによって指令されている温調モードが熱源側放熱運転状態（図２では、この状態を「温調モード＝冷房」とする）であり、かつ、所定の第３時間ｔｍ３が経過し（図２では、この状態を「ｔｍ３タイムアップ」とする）、かつ、第１利用側コントローラ７７ａによって第１利用ユニット４ａに給湯運転が指令されたかどうか（図２では、この指令がなされた状態を「給湯運転要求＝ＯＮ」とする）であり、これにより、温調モードが熱源側放熱運転状態になっている際に第１利用ユニット４ａに給湯運転が指令されたかどうかを判定する。ここで、時間ｔｍ３は、後述のステップＳ１０において設定される時間である。そして、このステップＳ２において、条件Ａを満たさないと判定された場合、すなわち、温調モードが熱源側蒸発運転状態である場合（図２では、この状態を「温調モード≠冷房」とする）、又は、第３時間ｔｍ３が経過していない場合、又は、第１利用側コントローラ７７ａによって第１利用ユニット４ａに給湯運転が指令されていない場合（すなわち、「給湯運転要求＝ＯＦＦ」）には、第２利用側コントローラ１０８ａによって指令されている温調モードにおける運転（すなわち、「優先給湯運転＝ＯＦＦ」）を継続し、条件Ａを満たすと判定された場合には、温調モードが熱源側放熱運転状態にあるにもかかわらず、給湯運転が指令された状態、すなわち、第１利用側コントローラ７７ａからの給湯運転の指令にしたがって第１利用ユニット４ａの運転を開始しても水媒体を加熱することはできない状態となっているため、優先給湯運転（ステップＳ７～Ｓ９）に向けて、ステップＳ３以降の処理に移行する。 First, the operation state in step S1, that is, the operation in the temperature control mode commanded by the second usage-side controller 108a (in FIG. 2, this operation is referred to as “priority hot water supply operation = OFF”) continues. And
Next, in step S2, it is determined whether or not the condition A is satisfied. Here, the condition A is that the temperature control mode commanded by the second usage-side controller 108a is the heat source side heat radiation operation state (in FIG. 2, this state is “temperature control mode = cooling”), and Whether a predetermined third time tm3 has elapsed (in FIG. 2, this state is referred to as “tm3 time-up”), and whether or not a hot water supply operation is commanded to the first usage unit 4a by the first usage-side controller 77a (FIG. 2, the state in which this command has been issued is “hot water supply operation request = ON”). Thus, when the temperature control mode is in the heat source side heat radiation operation state, the hot water supply operation is performed in the first usage unit 4a. Determine if commanded. Here, the time tm3 is a time set in step S10 described later. When it is determined in step S2 that the condition A is not satisfied, that is, when the temperature control mode is the heat source side evaporation operation state (in FIG. 2, this state is “temperature control mode ≠ cooling”). Alternatively, when the third time tm3 has not elapsed, or when the first usage-side controller 77a does not instruct the hot water supply operation to the first usage unit 4a (that is, “hot water supply operation request = OFF”). When the operation in the temperature control mode commanded by the second usage side controller 108a (that is, “priority hot water supply operation = OFF”) is continued and it is determined that the condition A is satisfied, the temperature control mode is on the heat source side. Despite being in the heat dissipation operation state, the hot water supply operation is instructed, that is, the first use in accordance with the hot water supply operation command from the first use side controller 77a. Since in a state where it is not possible to heat the aqueous medium be started the operation of the knitting 4a, towards the priority hot-water supply operation (step S7 ~ S9), the process proceeds to step S3 and subsequent steps.
　次に、ステップＳ３、Ｓ４では、条件Ａを満たす場合ではあるが、すぐに、優先給湯運転（ステップＳ７～Ｓ９）に移行するのではなく、ステップＳ３において、所定の第１時間ｔｍ１のカウントを開始し、ステップＳ１と同じく、第２利用側コントローラ１０８ａによって指令されている温調モードにおける運転（すなわち、「優先給湯運転＝ＯＦＦ」）を継続する。ここで、第１時間ｔｍ１は、ステップＳ２の処理が終了してからステップＳ５、Ｓ６の処理が行われるまでの時間間隔に相当するものであり、数分から１０分程度に設定される。
　次に、ステップＳ５において、条件Ｂを満たすかどうかを判定する。ここで、条件Ｂは、第２利用側コントローラ１０８ａによって指令されている温調モードが熱源側放熱運転状態（すなわち、「温調モード＝冷房」）であり、かつ、第１利用側コントローラ７７ａによって第１利用ユニット４ａに給湯運転が指令されたかどうか（すなわち、「給湯運転要求＝ＯＮ」）であり、かつ、第１時間ｔｍ１が経過したかどうか（図２では、この状態を「ｔｍ１タイムアップ」とする）、又は、外気温度Ｔｏが所定の低温条件温度Ｔｏｌより低いかどうか（図２では、この状態を「Ｔｏ＜Ｔｏｌ」とする）であり、これにより、ステップＳ２において、条件Ａを満たす状態が第１時間ｔｍ１継続しており給湯運転の要求が確実なものであるか、又は、外気温度Ｔｏが低温条件であるにもかかわらず、第２利用側コントローラ１０８ａによって指令されている温調モードが熱源側放熱運転状態（すなわち、「温調モード＝冷房」）になっているかを判定する。ここで、低温条件温度Ｔｏｌは、第２利用ユニット１０ａ、１０ｂの暖房運転を行うことが想定される最も高い温度に相当するものであり、１５℃程度に設定される。そして、このステップＳ５において、条件Ｂを満たさないと判定された場合、すなわち、温調モードが熱源側蒸発運転状態である場合（すなわち、「温調モード≠冷房」）、又は、第１利用側コントローラ７７ａによって第１利用ユニット４ａに給湯運転が指令されていない場合（すなわち、「給湯運転要求＝ＯＦＦ」）には、ステップＳ６の条件Ｄを満たすものと判定して、ステップＳ１の第２利用側コントローラ１０８ａによって指令されている温調モードにおける運転（すなわち、「優先給湯運転＝ＯＦＦ」）を継続し、条件Ｂを満たすと判定された場合には、給湯運転の要求が確実なものとなっている状態、又は、外気温度Ｔｏが低温条件であるにもかかわらず第２利用側コントローラ１０８ａによって指令されている温調モードが熱源側放熱運転状態（すなわち、「温調モード＝冷房」）になっている状態であるため、優先給湯運転（ステップＳ７～Ｓ９）に移行する。 Next, in steps S3 and S4, although the condition A is satisfied, the process does not immediately shift to the preferential hot water supply operation (steps S7 to S9), but in step S3, a predetermined first time tm1 is counted. As in step S1, the operation in the temperature adjustment mode commanded by the second usage-side controller 108a (that is, “priority hot water supply operation = OFF”) is continued. Here, the first time tm1 corresponds to a time interval from the end of the processing of step S2 to the processing of steps S5 and S6, and is set to about several minutes to 10 minutes.
Next, in step S5, it is determined whether or not the condition B is satisfied. Here, the condition B is that the temperature control mode commanded by the second usage-side controller 108a is the heat-source side heat radiation operation state (that is, “temperature control mode = cooling”), and the first usage-side controller 77a Whether or not a hot water supply operation is commanded to the first usage unit 4a (that is, “hot water supply operation request = ON”) and whether or not the first time tm1 has elapsed (in FIG. Or the outside air temperature To is lower than a predetermined low-temperature condition temperature Tol (in FIG. 2, this state is assumed to be “To <Tol”). Even though the state of satisfying continues for the first time tm1 and the request for hot water supply operation is certain, or the outside air temperature To is a low temperature condition, the second user side controller It determines whether temperature control mode which is commanded by chromatography La 108a is in the heat-source-side radiating operation state (i.e., "temperature adjustment mode = cooling"). Here, the low temperature condition temperature Tol corresponds to the highest temperature assumed to perform the heating operation of the second usage units 10a and 10b, and is set to about 15 ° C. In Step S5, when it is determined that the condition B is not satisfied, that is, when the temperature control mode is the heat source side evaporation operation state (that is, “temperature control mode ≠ cooling”), or the first usage side When the hot water supply operation is not instructed to the first usage unit 4a by the controller 77a (that is, “hot water supply operation request = OFF”), it is determined that the condition D of Step S6 is satisfied, and the second usage of Step S1 is performed. When the operation in the temperature control mode commanded by the side controller 108a (that is, “priority hot water supply operation = OFF”) is continued and it is determined that the condition B is satisfied, the request for the hot water supply operation is ensured. Or the temperature adjustment mode commanded by the second usage-side controller 108a even though the outside air temperature To is a low temperature condition. The source side radiating operation state (i.e., "temperature adjustment mode = cooling") for a state that is a, the process proceeds to the priority hot-water supply operation (step S7 ~ S9).
　次に、ステップＳ７～Ｓ９では、まず、ステップＳ７において、所定の第２時間ｔｍ２のカウントを開始する。ここで、第２時間ｔｍ２は、優先給湯運転を行う時間に相当するものであり、１０分から３０分程度に設定される。そして、ステップＳ８において、第２利用側コントローラ１０８ａが温調モードを熱源側放熱運転状態（すなわち、「温調モード＝冷房」）に指令しているにもかかわらず、温調モードを熱源側蒸発運転状態に切り換えるとともに、循環ポンプ４３ａの起動や第１利用側流量調節弁４１ａの開操作等を行って第１利用ユニット４ａの給湯運転（すなわち、優先給湯運転）を開始する。
　ところで、このような優先給湯運転を行うために、温調モードを熱源側放熱運転状態から熱源側蒸発運転状態に切り換えると、第２利用ユニット１０ａ、１０ｂが暖房運転を行う状態に切り換えられることになり、優先給湯運転が開始されるまで第２利用ユニット１０ａ、１０ｂが冷房運転を行っていた場合には、第２利用ユニット１０ａ、１０ｂが暖房運転を行う状態になり、また、優先給湯運転中に第２利用側コントローラ１０８ａ、１０８ｂから第２利用ユニット１０ａ、１０ｂに冷房運転が指令された場合に暖房運転を開始してしまうため、室内の快適性が損なわれて好ましくない。そこで、このヒートポンプシステム１では、優先給湯運転中は、第２利用ユニット１０ａ、１０ｂの冷房運転を禁止するようにしている。 Next, in steps S7 to S9, first, in step S7, counting of a predetermined second time tm2 is started. Here, the second time tm2 corresponds to the time for performing the priority hot water supply operation, and is set to about 10 to 30 minutes. In step S8, the second usage-side controller 108a commands the temperature adjustment mode to the heat source side heat radiation operation state (that is, “temperature adjustment mode = cooling”), but the temperature adjustment mode is changed to the heat source side evaporation. While switching to the operating state, the circulation pump 43a is started and the first usage-side flow rate adjustment valve 41a is opened to start the hot water supply operation (that is, priority hot water supply operation) of the first usage unit 4a.
By the way, in order to perform such priority hot water supply operation, when the temperature control mode is switched from the heat source side heat radiation operation state to the heat source side evaporation operation state, the second usage units 10a and 10b are switched to a state in which heating operation is performed. When the second usage units 10a and 10b are performing the cooling operation until the priority hot water supply operation is started, the second usage units 10a and 10b are in a state of performing the heating operation, and the priority hot water supply operation is being performed. In addition, since the heating operation is started when the second usage- side controllers 108a and 108b are instructed to the second usage units 10a and 10b, the indoor comfort is impaired, which is not preferable. Therefore, in the heat pump system 1, the cooling operation of the second usage units 10a and 10b is prohibited during the priority hot water supply operation.
　また、上述のように、優先給湯運転において、第２利用ユニット１０ａ、１０ｂの冷房運転を禁止する際に、第２利用側コントローラ１０８ａ、１０８ｂから冷房運転が指令されている第２利用ユニット１０ａ、１０ｂについて、利用側ファン１０５ａ、１０５ｂの運転も停止してしまうと、ユーザーが第２利用ユニット１０ａ、１０ｂの故障が発生したものと誤解するおそれがある。そこで、このヒートポンプシステム１では、第２利用側コントローラ１０８ａ、１０８ｂから冷房運転が指令されている第２利用ユニット１０ａ、１０ｂについては、優先給湯運転中は、第２利用側流量調節弁１０２ａ、１０２ｂの閉操作等を行って冷房運転を停止した状態で利用側ファン１０５ａ、１０５ｂを運転するようにしている。ここで、利用側ファン１０５ａ、１０５ｂの運転周波数は、室内のドラフト防止のために、最低周波数にすることが好ましい。 In addition, as described above, in the priority hot water supply operation, when the cooling operation of the second usage units 10a and 10b is prohibited, the second usage unit 10a to which the cooling operation is instructed from the second usage- side controllers 108a and 108b, If the operation of the use side fans 105a and 105b is also stopped for 10b, the user may misunderstand that the failure of the second use units 10a and 10b has occurred. Therefore, in the heat pump system 1, the second usage-side flow rate adjustment valves 102a and 102b of the second usage units 10a and 10b for which the cooling operation is commanded from the second usage- side controllers 108a and 108b during the priority hot water supply operation. The use- side fans 105a and 105b are operated in a state where the cooling operation is stopped by performing a closing operation or the like. Here, the operating frequency of the use side fans 105a and 105b is preferably set to the lowest frequency in order to prevent indoor drafts.
　さらに、上述のように、優先給湯運転において、第２利用ユニット１０ａ、１０ｂの冷房運転を停止することに連動して、第２利用側コントローラ１０８ａ、１０８ｂにおける第２利用ユニット１０ａ、１０ｂの運転状態の表示を変更（すなわち、冷房運転を停止に変更）してしまうと、ユーザーが第２利用ユニット１０ａ、１０ｂの故障が発生したものと誤解するおそれがある。そこで、このヒートポンプシステム１では、優先給湯運転における第２利用ユニット１０ａ、１０ｂの冷房運転の停止中においても、第２利用側コントローラ１０８ａ、１０８ｂが冷房運転中である旨の表示を維持するようにしている。
　そして、この優先給湯運転は、ステップＳ９において、条件Ｃを満たすまで継続される。ここで、条件Ｃは、第２利用側コントローラ１０８ａによって温調モードが熱源側蒸発運転状態に切り換えるように指令されるか（すなわち、「温調モード≠冷房」）、又は、第１利用側コントローラ７７ａによって第１利用ユニット４ａに給湯運転を停止する指令がされるか（すなわち、「給湯運転要求＝ＯＦＦ」）又は、外気温度Ｔｏが所定の高温条件温度Ｔｏｈより高い状態（図２では、この状態を「Ｔｏ＞Ｔｏｈ」とする）で第２時間ｔｍ２が経過するか（図２では、この状態を「ｔｍ２タイムアップ」とする）であり、これにより、ステップＳ９において、優先給湯運転を行わなくても給湯運転が可能な状態になったか、又は、給湯運転が不要になったか、又は、優先給湯運転が第２時間ｔｍ２継続したかを判定する。ここで、高温条件温度Ｔｏｈは、第２利用ユニット１０ａ、１０ｂの冷房運転を行うことが想定される最も低い温度に相当するものであり、２０℃程度に設定される。そして、優先給湯運転は、このステップＳ９において、条件Ｃを満たすと判定されるまで、すなわち、優先給湯運転を行わなくても給湯運転が可能な状態になり、又は、給湯運転が不要になり、又は、優先給湯運転が第２時間ｔｍ２継続するまで継続され、その後、第２利用側コントローラ１０８ａが指令している温調モードにおける運転に戻す処理（ステップＳ１０、Ｓ１）に移行する。 Further, as described above, in the priority hot water supply operation, in conjunction with stopping the cooling operation of the second usage units 10a and 10b, the operating state of the second usage units 10a and 10b in the second usage- side controllers 108a and 108b. If the display is changed (that is, the cooling operation is changed to stop), the user may misunderstand that the failure of the second usage units 10a and 10b has occurred. Therefore, in this heat pump system 1, even when the cooling operation of the second usage units 10a and 10b in the priority hot water supply operation is stopped, the display indicating that the second usage- side controllers 108a and 108b are in the cooling operation is maintained. ing.
This priority hot water supply operation is continued until the condition C is satisfied in step S9. Here, the condition C is that the second usage side controller 108a commands the temperature control mode to switch to the heat source side evaporation operation state (that is, “temperature control mode ≠ cooling”), or the first usage side controller 77a is instructed to stop the hot water supply operation to the first usage unit 4a (that is, “hot water supply operation request = OFF”) or the outside air temperature To is higher than a predetermined high temperature condition temperature Toh (in FIG. Whether or not the second time tm2 has passed (the state is “To> Toh”) (in FIG. 2, this state is “tm2 time-up”), and in step S9, the priority hot water supply operation is performed. Without it, it is determined whether the hot water supply operation is possible, whether the hot water supply operation is no longer necessary, or whether the priority hot water supply operation has continued for the second time tm2. Here, the high temperature condition temperature Toh corresponds to the lowest temperature at which the cooling operation of the second usage units 10a and 10b is assumed, and is set to about 20 ° C. The priority hot water supply operation is in a state in which it is determined in step S9 that the condition C is satisfied, that is, the hot water supply operation can be performed without performing the priority hot water supply operation, or the hot water supply operation becomes unnecessary. Alternatively, the priority hot water supply operation is continued until the second time tm2 is continued, and thereafter, the process shifts to the process (steps S10 and S1) for returning to the operation in the temperature control mode commanded by the second usage-side controller 108a.
　次に、ステップＳ１０、Ｓ１では、まず、ステップＳ１０において、所定の第３時間ｔｍ３のカウントを開始し、そして、ステップＳ１において、第２利用側コントローラ１０８ａが指令している温調モードにおける運転に戻す処理が行われる。ここで、第３時間ｔｍ３は、優先給湯運転が要求されている場合において、優先給湯運転を行なわずに第２利用側コントローラ１０８ａが指令している温調モードにおける運転を行う時間に相当するものであり、５分から２５分程度に設定される。例えば、第２利用ユニット１０ａ、１０ｂの冷房運転中に第１利用ユニット４ａの給湯運転が要求された場合には、優先給湯運転が第２時間ｔｍ２だけ行われ、冷房運転が第３時間ｔｍ３だけ行われることになる。
　以上のような温調モード切り換え制御によって、このヒートポンプシステム１では、第２利用ユニット１０ａ、１０ｂの運転が停止している場合、又は、冷房運転が行われている場合（すなわち、第２利用側コントローラ１０８ａが指令している温調モードが熱源側放熱運転状態である場合）において、第１利用ユニット１０ａに給湯運転が要求された場合（すなわち、第１利用側コントローラ７７ａから第１利用ユニット４ａに給湯運転が指令された場合）には、第２利用側コントローラ１０８ａが温調モードを熱源側放熱運転状態に指令しているにもかかわらず、温調モードを熱源側蒸発運転状態に切り換えて優先給湯運転を行うことができる、すなわち、第２利用側コントローラ１０８ａが指令している温調モードとしての熱源側切換機構２３の切換状態とは異なる温調モードに切り換えて運転することが可能になっている。 Next, in steps S10 and S1, first, in step S10, counting of a predetermined third time tm3 is started, and in step S1, the operation in the temperature control mode commanded by the second usage-side controller 108a is started. Processing to return is performed. Here, the third time tm3 corresponds to the time during which the operation in the temperature control mode commanded by the second use side controller 108a is performed without performing the priority hot water supply operation when the priority hot water supply operation is requested. It is set to about 5 to 25 minutes. For example, when the hot water supply operation of the first usage unit 4a is requested during the cooling operation of the second usage units 10a and 10b, the priority hot water supply operation is performed for the second time tm2, and the cooling operation is performed for the third time tm3. Will be done.
With the heat control mode switching control as described above, in the heat pump system 1, when the operation of the second usage units 10a and 10b is stopped, or when the cooling operation is being performed (that is, the second usage side). When the temperature control mode commanded by the controller 108a is the heat source side heat radiation operation state), when the hot water supply operation is requested from the first usage unit 10a (that is, from the first usage side controller 77a to the first usage unit 4a). When the second use-side controller 108a commands the temperature control mode to the heat source side heat radiation operation state, the temperature control mode is switched to the heat source side evaporation operation state. Priority hot water supply operation can be performed, that is, the heat source side switching as the temperature control mode commanded by the second usage side controller 108a It becomes possible to operate by switching to a different temperature control mode the switching state of the structure 23.
　＜特徴＞
　このヒートポンプシステム１には、以下のような特徴がある。
　－Ａ－
　このヒートポンプシステム１では、上述の温調モード切り換え制御のように、第２利用ユニット１０ａ、１０ｂに指令を行う第２利用側コントローラ１０８ａ、１０８ｂ（ここでは、第２利用側コントローラ１０８ａとしている）が指令している温調モードとしての熱源側切換機構２３の切換状態とは異なる温調モードに切り換えて運転することを可能になっており、例えば、温調モードが熱源側放熱運転状態に切り換えられた状態において給湯運転を行う場合には、温調モードが熱源側蒸発運転状態に切り換えられる等のように、ユーザーが温調モードを切り換える操作（指令）を行うことなく、所望の運転に適した温調モードに切り換えを行うことができる。 <Features>
This heat pump system 1 has the following features.
-A-
In this heat pump system 1, as in the temperature control mode switching control described above, the second usage side controllers 108 a and 108 b (in this case, the second usage side controller 108 a) that commands the second usage units 10 a and 10 b are provided. It is possible to operate by switching to a temperature control mode different from the switching state of the heat source side switching mechanism 23 as the commanded temperature control mode. For example, the temperature control mode is switched to the heat source side heat radiation operation state. When the hot water supply operation is performed in the above state, the user is not required to perform an operation (command) for switching the temperature control mode, for example, the temperature control mode is switched to the heat source side evaporation operation state. Switching to temperature control mode can be performed.
　－Ｂ－
　このヒートポンプシステム１では、上述の温調モード切り換え制御におけるステップＳ２、ステップＳ５、Ｓ６、Ｓ９のように、温調モードの切り換えは、指令された温調モード（ここでは、第２利用側コントローラ１０８ａが指令している温調モードとしての熱源側切換機構２３の切換状態）及び外気温度Ｔｏの少なくとも１つに基づいて行うようにしているため、温調モードの切り換えを適切に行うことができる。
　また、このヒートポンプシステム１では、上述の温調モード切り換え制御におけるステップＳ１～Ｓ６のように、２段階で温調モードの切り換えが必要かどうか（ここでは、優先給湯運転を行う必要があるかどうか）を判定するようにしているため、温調モードのハンチングが生じにくくなっている。 -B-
In this heat pump system 1, the temperature control mode is switched as in the commanded temperature control mode (here, the second usage-side controller 108 a) as in steps S 2, S 5, S 6, and S 9 in the temperature control mode switching control described above. Is switched based on at least one of the switching state of the heat source side switching mechanism 23 as the temperature control mode commanded by the engine and the outside air temperature To, so that the temperature control mode can be switched appropriately.
Further, in this heat pump system 1, whether or not the temperature control mode needs to be switched in two stages as in steps S1 to S6 in the temperature control mode switching control described above (in this case, whether or not the priority hot water supply operation needs to be performed). ) Is determined, it is difficult for temperature control mode hunting to occur.
　－Ｃ－
　このヒートポンプシステム１では、温調モードが熱源側放熱運転状態になっている際において、第１利用側コントローラ７７ａから第１利用ユニット４ａに給湯運転が指令された場合には、温調モードを熱源側放熱運転状態から熱源側蒸発運転状態に切り換えることで、第１利用ユニット４ａの給湯運転（すなわち、優先給湯運転）を行うことができるため、夏期等の冷房運転が必要な運転条件においても、ユーザーが温調モードを熱源側蒸発運転状態に切り換えする操作（指令）を行うことなく、必要に応じて給湯運転を行うことができる。
　－Ｄ－
　このヒートポンプシステム１では、優先給湯運転を行う際には、第２利用ユニット１０ａ、１０ｂの冷房運転を禁止するようにしているため、優先給湯運転を行うための温調モードを放熱運転状態から蒸発運転状態に切り換えによって、冷房運転を行っていた第２利用ユニット１０ａ、１０ｂが暖房運転を行う状態になったり、また、優先給湯運転中に第２利用側コントローラ１０８ａ、１０８ｂから第２利用ユニット１０ａ、１０ｂに冷房運転が指令された場合に暖房運転を開始してしまうことがなくなり、これにより、優先給湯運転を行う際に、室内の快適性が損なわれることを防ぐことができる。 -C-
In this heat pump system 1, when the temperature adjustment mode is in the heat source side heat radiation operation state, when the first use side controller 77a instructs the first use unit 4a to perform the hot water supply operation, the temperature adjustment mode is set to the heat source mode. By switching from the side heat radiation operation state to the heat source side evaporation operation state, the hot water supply operation (that is, the priority hot water supply operation) of the first usage unit 4a can be performed. The user can perform hot water supply operation as necessary without performing an operation (command) for switching the temperature control mode to the heat source side evaporation operation state.
-D-
In this heat pump system 1, when performing the priority hot water supply operation, the cooling operation of the second usage units 10 a and 10 b is prohibited. Therefore, the temperature control mode for performing the priority hot water supply operation is evaporated from the heat dissipation operation state. By switching to the operation state, the second usage units 10a and 10b that have been performing the cooling operation enter a state in which the heating operation is performed. When the cooling operation is commanded to 10b, the heating operation is not started, and this can prevent the indoor comfort from being impaired when the priority hot water supply operation is performed.
　また、このヒートポンプシステム１では、第２利用側コントローラ１０８ａ、１０８ｂから冷房運転が指令されている第２利用ユニット１０ａ、１０ｂについては、優先給湯運転中は、冷房運転を停止した状態で利用側ファン１０５ａ、１０５ｂを運転するようにしているため、第２利用ユニット１０ａ、１０ｂの冷房運転を禁止する際に、冷房運転中の第２利用ユニット１０ａ、１０ｂの利用側ファン１０５ａ、１０５ｂの運転を停止してしまうことがなくなり、これにより、優先給湯運転を行うことでユーザーが第２利用ユニット１０ａ、１０ｂの故障が発生したものと誤解しないようにすることができる。
　さらに、このヒートポンプシステム１では、優先給湯運転における第２利用ユニット１０ａ、１０ｂの冷房運転の停止中においても、第２利用側コントローラ１０８ａ、１０８ｂが冷房運転中である旨の表示を維持するようにしているため、優先給湯運転において、第２利用ユニット１０ａ、１０ｂの冷房運転を停止することに連動して、第２利用側コントローラ１０８ａ、１０８ｂにおける第２利用ユニットの運転状態の表示を変更されてしまうことがなくなり、これにより、優先給湯運転を行うことでユーザーが第２利用ユニット１０ａ、１０ｂの故障が発生したものと誤解しないようにすることができる。 Further, in the heat pump system 1, the second usage units 10a and 10b for which the cooling operation is instructed from the second usage- side controllers 108a and 108b are used in the state where the cooling operation is stopped during the priority hot water supply operation. Since 105a and 105b are operated, when the cooling operation of the second usage units 10a and 10b is prohibited, the operation of the usage- side fans 105a and 105b of the second usage units 10a and 10b during the cooling operation is stopped. Thus, it is possible to prevent the user from misunderstanding that the failure of the second usage units 10a and 10b has occurred by performing the priority hot water supply operation.
Furthermore, in this heat pump system 1, even when the cooling operation of the second usage units 10a and 10b in the priority hot water supply operation is stopped, the display indicating that the second usage- side controllers 108a and 108b are in the cooling operation is maintained. Therefore, in the priority hot water supply operation, the display of the operation state of the second usage unit in the second usage side controllers 108a and 108b has been changed in conjunction with stopping the cooling operation of the second usage units 10a and 10b. This prevents the user from misunderstanding that the failure of the second usage units 10a and 10b has occurred by performing the priority hot water supply operation.
　（第２実施形態）
　上述の第１実施形態におけるヒートポンプシステム１では、例えば、６５℃以上の温水のような高温の水媒体を得るためには、熱源側圧縮機２１の吐出における熱源側冷媒の圧力を高くする等の運転効率の悪い条件で運転を行う必要があり、好ましいものとはいえない。
　そこで、このヒートポンプシステム２００では、上述の第１実施形態におけるヒートポンプシステム１（図１参照）の構成において、図３に示されるように、第１利用側熱交換器４１ａをガス冷媒連絡管１４から導入される熱源側冷媒と熱源側冷媒とは別の利用側冷媒との熱交換を行う熱交換器とし、第１利用ユニット４ａに、利用側冷媒を圧縮する利用側圧縮機６２ａ（後述）や利用側冷媒の放熱器として機能して水媒体を加熱することが可能な冷媒－水熱交換器６５ａ（後述）等をさらに設けることで、第１利用側熱交換器４１ａとともに利用側冷媒が循環する利用側冷媒回路４０ａを構成するようにしている。以下、このヒートポンプシステム２００の構成について説明する。 (Second Embodiment)
In the heat pump system 1 in the first embodiment described above, for example, in order to obtain a high temperature aqueous medium such as hot water of 65 ° C. or higher, the pressure of the heat source side refrigerant in the discharge of the heat source side compressor 21 is increased. It is necessary to operate under conditions with poor operating efficiency, which is not preferable.
Therefore, in this heat pump system 200, in the configuration of the heat pump system 1 (see FIG. 1) in the first embodiment described above, the first usage-side heat exchanger 41a is connected to the gas refrigerant communication pipe 14 as shown in FIG. A heat exchanger that exchanges heat between the heat-source-side refrigerant and the heat-source-side refrigerant that is introduced is used as a heat exchanger, and a first-side use unit 4a uses a use-side compressor 62a (described later) that compresses the use-side refrigerant. By further providing a refrigerant-water heat exchanger 65a (described later) that functions as a heat radiator for the use side refrigerant and can heat the aqueous medium, the use side refrigerant circulates together with the first use side heat exchanger 41a. The use side refrigerant circuit 40a is configured. Hereinafter, the configuration of the heat pump system 200 will be described.
　＜構成＞
　－全体－
　図３は、本発明の第２実施形態にかかるヒートポンプシステム２００の概略構成図である。ヒートポンプシステム２００は、蒸気圧縮式のヒートポンプサイクルを利用して水媒体を加熱する運転等を行うことが可能な装置である。
　ヒートポンプシステム２００は、主として、熱源ユニット２と、第１利用ユニット４ａと、第２利用ユニット１０ａ、１０ｂと、液冷媒連絡管１３と、ガス冷媒連絡管１４と、貯湯ユニット８ａと、温水暖房ユニット９ａと、水媒体連絡管１５ａと、水媒体連絡管１６ａとを備えており、熱源ユニット２と第１利用ユニット４ａと第２利用ユニット１０ａ、１０ｂとが冷媒連絡管１３、１４を介して接続されることによって、熱源側冷媒回路２０を構成し、第１利用ユニット４ａが利用側冷媒回路４０ａを構成し、第１利用ユニット４ａと貯湯ユニット８ａと温水暖房ユニット９ａとが水媒体連絡管１５ａ、１６ａを介して接続されることによって、水媒体回路８０ａを構成している。熱源側冷媒回路２０には、ＨＦＣ系冷媒の一種であるＨＦＣ－４１０Ａが熱源側冷媒として封入されており、また、ＨＦＣ系冷媒に対して相溶性を有するエステル系又はエーテル系の冷凍機油が熱源側圧縮機２１の潤滑のために封入されている。また、利用側冷媒回路４０ａには、ＨＦＣ系冷媒の一種であるＨＦＣ－１３４ａが利用側冷媒として封入されており、また、ＨＦＣ系冷媒に対して相溶性を有するエステル系又はエーテル系の冷凍機油が利用側圧縮機６２ａの潤滑のために封入されている。尚、利用側冷媒としては、高温の冷凍サイクルに有利な冷媒を使用されるという観点から、飽和ガス温度６５℃に相当する圧力がゲージ圧で高くとも２．８ＭＰａ以下、好ましくは、２．０ＭＰａ以下の冷媒を使用することが好ましい。そして、ＨＦＣ－１３４ａは、このような飽和圧力特性を有する冷媒の一種である。また、水媒体回路８０ａには、水媒体としての水が循環するようになっている。 <Configuration>
-The entire-
FIG. 3 is a schematic configuration diagram of a heat pump system 200 according to the second embodiment of the present invention. The heat pump system 200 is an apparatus that can perform an operation of heating an aqueous medium using a vapor compression heat pump cycle.
The heat pump system 200 mainly includes a heat source unit 2, a first usage unit 4a, second usage units 10a and 10b, a liquid refrigerant communication tube 13, a gas refrigerant communication tube 14, a hot water storage unit 8a, and a hot water heating unit. 9 a, an aqueous medium communication pipe 15 a, and an aqueous medium communication pipe 16 a, and the heat source unit 2, the first usage unit 4 a, and the second usage units 10 a and 10 b are connected via the refrigerant communication pipes 13 and 14. Thus, the heat source side refrigerant circuit 20 is constituted, the first usage unit 4a constitutes the usage side refrigerant circuit 40a, and the first usage unit 4a, the hot water storage unit 8a, and the hot water heating unit 9a are connected to the aqueous medium communication pipe 15a. , 16a to form an aqueous medium circuit 80a. In the heat source side refrigerant circuit 20, HFC-410A, which is a kind of HFC refrigerant, is sealed as a heat source refrigerant, and ester or ether refrigerating machine oil compatible with the HFC refrigerant is used as the heat source. It is enclosed for lubrication of the side compressor 21. Further, HFC-134a, which is a kind of HFC refrigerant, is sealed in the use side refrigerant circuit 40a as a use side refrigerant, and ester or ether type refrigerating machine oil having compatibility with the HFC refrigerant. Is enclosed for lubrication of the use side compressor 62a. In addition, as a use side refrigerant | coolant, from a viewpoint that the refrigerant | coolant advantageous to a high temperature refrigerating cycle is used, the pressure corresponding to saturation gas temperature 65 degreeC is 2.8 Mpa or less at the maximum at a gauge pressure, Preferably, it is 2.0 Mpa. The following refrigerants are preferably used. HFC-134a is a kind of refrigerant having such saturation pressure characteristics. Further, water as an aqueous medium circulates in the aqueous medium circuit 80a.
　尚、以下の構成に関する説明では、第１実施形態におけるヒートポンプシステム１（図１参照）と同様の構成を有する熱源ユニット２、第２利用ユニット１０ａ、貯湯ユニット８ａ、温水暖房ユニット９ａ、液冷媒連絡管１３、ガス冷媒連絡管１４、水媒体連絡管１５ａ、１６ａ、第１利用側コントローラ７７ａ、及び、第２利用側コントローラ１０８ａ、１０８ｂの構成については、同じ符号を付して説明を省略し、第１利用ユニット４ａの構成のみについて説明を行う。
　－第１利用ユニット－
　第１利用ユニット４ａは、屋内に設置されており、冷媒連絡管１３、１４を介して熱源ユニット２に接続されており、熱源側冷媒回路２０の一部を構成している。また、第１利用ユニット４ａは、利用側冷媒回路４０ａを構成している。さらに、第１利用ユニット４ａは、水媒体連絡管１５ａ、１６ａを介して貯湯ユニット８ａ及び温水暖房ユニット９ａに接続されており、水媒体回路８０ａの一部を構成している。 In the following description of the configuration, the heat source unit 2, the second usage unit 10a, the hot water storage unit 8a, the hot water heating unit 9a, and the liquid refrigerant communication having the same configuration as the heat pump system 1 (see FIG. 1) in the first embodiment. The configurations of the pipe 13, the gas refrigerant communication pipe 14, the aqueous medium communication pipes 15a and 16a, the first usage side controller 77a, and the second usage side controllers 108a and 108b are denoted by the same reference numerals, and description thereof is omitted. Only the configuration of the first usage unit 4a will be described.
-First use unit-
The first usage unit 4 a is installed indoors and connected to the heat source unit 2 via the refrigerant communication tubes 13 and 14 and constitutes a part of the heat source side refrigerant circuit 20. Moreover, the 1st utilization unit 4a comprises the utilization side refrigerant circuit 40a. Furthermore, the 1st utilization unit 4a is connected to the hot water storage unit 8a and the hot water heating unit 9a via the aqueous medium communication pipes 15a and 16a, and constitutes a part of the aqueous medium circuit 80a.
　第１利用ユニット４ａは、主として、第１利用側熱交換器４１ａと、第１利用側流量調節弁４２ａと、利用側圧縮機６２ａと、冷媒－水熱交換器６５ａと、冷媒－水熱交側流量調節弁６６ａと、利用側アキュムレータ６７ａと、循環ポンプ４３ａとを有している。
　第１利用側熱交換器４１ａは、熱源側冷媒と利用側冷媒との熱交換を行うことで熱源側冷媒の放熱器として機能する熱交換器であり、その熱源側冷媒が流れる流路の液側には、第１利用側液冷媒管４５ａが接続されており、その熱源側冷媒が流れる流路のガス側には、第１利用側ガス冷媒管５４ａが接続されており、その利用側冷媒が流れる流路の液側には、カスケード側液冷媒管６８ａが接続されており、その利用側冷媒が流れる流路のガス側には、第２カスケード側ガス冷媒管６９ａが接続されている。第１利用側液冷媒管４５ａには、液冷媒連絡管１３が接続されており、第１利用側ガス冷媒管５４ａには、ガス冷媒連絡管１４が接続されており、カスケード側液冷媒管６８ａには、冷媒－水熱交換器６５ａが接続されており、第２カスケード側ガス冷媒管６９ａには、利用側圧縮機６２ａが接続されている。 The first usage unit 4a mainly includes a first usage-side heat exchanger 41a, a first usage-side flow rate adjustment valve 42a, a usage-side compressor 62a, a refrigerant-water heat exchanger 65a, and a refrigerant-hydrothermal exchange. It has a side flow rate adjustment valve 66a, a use side accumulator 67a, and a circulation pump 43a.
The first usage-side heat exchanger 41a is a heat exchanger that functions as a radiator for the heat-source-side refrigerant by performing heat exchange between the heat-source-side refrigerant and the usage-side refrigerant, and is a liquid in a flow path through which the heat-source-side refrigerant flows. A first use side liquid refrigerant tube 45a is connected to the side, and a first use side gas refrigerant tube 54a is connected to the gas side of the flow path through which the heat source side refrigerant flows, and the use side refrigerant. A cascade side liquid refrigerant pipe 68a is connected to the liquid side of the flow path through which the refrigerant flows, and a second cascade side gas refrigerant pipe 69a is connected to the gas side of the flow path through which the use side refrigerant flows. The liquid refrigerant communication pipe 13 is connected to the first usage side liquid refrigerant pipe 45a, the gas refrigerant communication pipe 14 is connected to the first usage side gas refrigerant pipe 54a, and the cascade side liquid refrigerant pipe 68a. The refrigerant-water heat exchanger 65a is connected to the second cascade side gas refrigerant pipe 69a, and the use side compressor 62a is connected to the second cascade side gas refrigerant pipe 69a.
　第１利用側流量調節弁４２ａは、開度制御を行うことで第１利用側熱交換器４１ａを流れる熱源側冷媒の流量を可変することが可能な電動膨張弁であり、第１利用側液冷媒管４５ａに設けられている。
　利用側圧縮機６２ａは、利用側冷媒を圧縮する機構であり、ここでは、ケーシング（図示せず）内に収容されたロータリ式やスクロール式等の容積式の圧縮要素（図示せず）が、同じくケーシング内に収容された利用側圧縮機モータ６３ａによって駆動される密閉式圧縮機が採用されている。この利用側圧縮機６２ａのケーシング内には、圧縮要素において圧縮された後の熱源側冷媒が充満する高圧空間（図示せず）が形成されており、この高圧空間には、冷凍機油が溜められている。利用側圧縮機モータ６３ａは、インバータ装置（図示せず）によって、その回転数（すなわち、運転周波数）を可変でき、これにより、利用側圧縮機６２ａの容量制御が可能になっている。また、利用側圧縮機６２ａの吐出には、カスケード側吐出管７０ａが接続されており、利用側圧縮機６２ａの吸入には、カスケード側吸入管７１ａが接続されている。このカスケード側吸入管７１ａは、第２カスケード側ガス冷媒管６９ａに接続されている。 The first usage-side flow rate adjustment valve 42a is an electric expansion valve capable of changing the flow rate of the heat source-side refrigerant flowing through the first usage-side heat exchanger 41a by performing opening degree control. It is provided in the refrigerant pipe 45a.
The use side compressor 62a is a mechanism for compressing the use side refrigerant. Here, a rotary type or scroll type volumetric compression element (not shown) housed in a casing (not shown) is used. Similarly, a hermetic compressor driven by a use side compressor motor 63a accommodated in the casing is employed. A high-pressure space (not shown) filled with the heat-source-side refrigerant after being compressed by the compression element is formed in the casing of the use-side compressor 62a, and refrigeration oil is stored in the high-pressure space. ing. The use-side compressor motor 63a can vary the rotation speed (that is, the operating frequency) by an inverter device (not shown), thereby enabling capacity control of the use-side compressor 62a. Further, a cascade side discharge pipe 70a is connected to the discharge of the use side compressor 62a, and a cascade side intake pipe 71a is connected to the intake of the use side compressor 62a. The cascade side suction pipe 71a is connected to the second cascade side gas refrigerant pipe 69a.
　冷媒－水熱交換器６５ａは、利用側冷媒と水媒体との熱交換を行うことで利用側冷媒の放熱器として機能する熱交換器であり、その利用側冷媒が流れる流路の液側には、カスケード側液冷媒管６８ａが接続されており、その利用側冷媒が流れる流路のガス側には、第１カスケード側ガス冷媒管７２ａが接続されており、その水媒体が流れる流路の入口側には、第１利用側水入口管４７ａが接続されており、その水媒体が流れる流路の出口側には、第１利用側水出口管４８ａが接続されている。第１カスケード側ガス冷媒管７２ａは、カスケード側吐出管７０ａに接続されており、第１利用側水入口管４７ａには、水媒体連絡管１５ａが接続されており、第１利用側水出口管４８ａには、水媒体連絡管１６ａが接続されている。
　冷媒－水熱交側流量調節弁６６ａは、開度制御を行うことで冷媒－水熱交換器６５ａを流れる利用側冷媒の流量を可変することが可能な電動膨張弁であり、カスケード側液冷媒管６８ａに設けられている。 The refrigerant-water heat exchanger 65a is a heat exchanger that functions as a heat radiator for the usage-side refrigerant by exchanging heat between the usage-side refrigerant and the aqueous medium. The cascade side liquid refrigerant pipe 68a is connected to the gas side of the flow path through which the use side refrigerant flows, and the first cascade side gas refrigerant pipe 72a is connected to the flow path through which the aqueous medium flows. A first usage-side water inlet pipe 47a is connected to the inlet side, and a first usage-side water outlet pipe 48a is connected to the outlet side of the flow path through which the aqueous medium flows. The first cascade side gas refrigerant pipe 72a is connected to the cascade side discharge pipe 70a, the aqueous medium communication pipe 15a is connected to the first use side water inlet pipe 47a, and the first use side water outlet pipe is connected. The aqueous medium communication pipe 16a is connected to 48a.
The refrigerant-water heat exchange side flow rate adjustment valve 66a is an electric expansion valve capable of varying the flow rate of the use side refrigerant flowing through the refrigerant-water heat exchanger 65a by controlling the opening degree. It is provided in the pipe 68a.
　利用側アキュムレータ６７ａは、カスケード側吸入管７１ａに設けられており、利用側冷媒回路４０ａを循環する利用側冷媒をカスケード側吸入管７１ａから利用側圧縮機６２ａに吸入される前に一時的に溜めるための容器である。
　このように、利用側圧縮機６２ａ、冷媒－水熱交換器６５ａ、冷媒－水熱交側流量調節弁６６ａ及び第１利用側熱交換器４１ａが冷媒管７１ａ、７０ａ、７２ａ、６８ａ、６９ａを介して接続されることによって、利用側冷媒回路４０ａが構成されている。
　循環ポンプ４３ａは、水媒体の昇圧を行う機構であり、ここでは、遠心式や容積式のポンプ要素（図示せず）が循環ポンプモータ４４ａによって駆動されるポンプが採用されている。循環ポンプ４３ａは、第１利用側水出口管４８ａに設けられている。循環ポンプモータ４４ａは、インバータ装置（図示せず）によって、その回転数（すなわち、運転周波数）を可変でき、これにより、循環ポンプ４３ａの容量制御が可能になっている。 The use side accumulator 67a is provided in the cascade side suction pipe 71a, and temporarily stores the use side refrigerant circulating in the use side refrigerant circuit 40a before being sucked from the cascade side suction pipe 71a into the use side compressor 62a. It is a container for.
As described above, the use side compressor 62a, the refrigerant-water heat exchanger 65a, the refrigerant-water heat exchange side flow rate adjustment valve 66a, and the first use side heat exchanger 41a connect the refrigerant pipes 71a, 70a, 72a, 68a, 69a. Thus, the use-side refrigerant circuit 40a is configured by being connected to each other.
The circulation pump 43a is a mechanism for boosting the aqueous medium. Here, a pump in which a centrifugal or positive displacement pump element (not shown) is driven by a circulation pump motor 44a is employed. The circulation pump 43a is provided in the first usage-side water outlet pipe 48a. The circulation pump motor 44a can vary the rotation speed (that is, the operating frequency) by an inverter device (not shown), thereby enabling capacity control of the circulation pump 43a.
　これにより、第１利用ユニット４ａは、第１利用側熱交換器４１ａをガス冷媒連絡管１４から導入される熱源側冷媒の放熱器として機能させることで、第１利用側熱交換器４１ａにおいて放熱した熱源側冷媒を液冷媒連絡管１３に導出し、第１利用側熱交換器４１ａにおける熱源側冷媒の放熱によって利用側冷媒回路４０ａを循環する利用側冷媒を加熱し、この加熱された利用側冷媒が利用側圧縮機６２ａにおいて圧縮された後に、冷媒－水熱交換器６５ａにおいて放熱することによって水媒体を加熱する給湯運転を行うことが可能になっている。
　また、第１利用ユニット４ａには、各種のセンサが設けられている。具体的には、第１利用ユニット４ａには、第１利用側熱交換器４１ａの液側における熱源側冷媒の温度である第１利用側冷媒温度Ｔｓｃ１を検出する第１利用側熱交温度センサ５０ａと、冷媒－水熱交換器６５ａの液側における利用側冷媒の温度であるカスケード側冷媒温度Ｔｓｃ２を検出する第１冷媒－水熱交温度センサ７３ａと、冷媒－水熱交換器６５ａの入口における水媒体の温度である水媒体入口温度Ｔｗｒを検出する水媒体出口温度センサ５１ａと、冷媒－水熱交換器６５ａの出口における水媒体の温度である水媒体出口温度Ｔｗｌを検出する水媒体出口温度センサ５２ａと、利用側圧縮機６２ａの吸入における利用側冷媒の圧力である利用側吸入圧力Ｐｓ２を検出する利用側吸入圧力センサ７４ａと、利用側圧縮機６２ａの吐出における利用側冷媒の圧力である利用側吐出圧力Ｐｄ２を検出する利用側吐出圧力センサ７５ａと、利用側圧縮機６２ａの吐出における利用側冷媒の温度である利用側吐出温度Ｔｄ２を検出する利用側吐出温度センサ７６ａとが設けられている。 Accordingly, the first usage unit 4a causes the first usage-side heat exchanger 41a to radiate heat by causing the first usage-side heat exchanger 41a to function as a heat radiator for the heat-source-side refrigerant introduced from the gas refrigerant communication tube 14. The used heat source side refrigerant is led out to the liquid refrigerant communication pipe 13, and the use side refrigerant circulating in the use side refrigerant circuit 40a is heated by the heat radiation of the heat source side refrigerant in the first use side heat exchanger 41a, and this heated use side After the refrigerant is compressed in the use side compressor 62a, it is possible to perform a hot water supply operation for heating the aqueous medium by radiating heat in the refrigerant-water heat exchanger 65a.
The first usage unit 4a is provided with various sensors. Specifically, the first usage unit 4a includes a first usage-side heat exchange temperature sensor that detects the first usage-side refrigerant temperature Tsc1, which is the temperature of the heat-source-side refrigerant on the liquid side of the first usage-side heat exchanger 41a. 50a, a first refrigerant-water heat exchanger temperature sensor 73a for detecting a cascade-side refrigerant temperature Tsc2 which is a temperature of a use-side refrigerant on the liquid side of the refrigerant-water heat exchanger 65a, and an inlet of the refrigerant-water heat exchanger 65a An aqueous medium outlet temperature sensor 51a that detects an aqueous medium inlet temperature Twr that is the temperature of the aqueous medium in the water medium, and an aqueous medium outlet that detects an aqueous medium outlet temperature Twl that is the temperature of the aqueous medium at the outlet of the refrigerant-water heat exchanger 65a A temperature sensor 52a, a use side suction pressure sensor 74a that detects a use side suction pressure Ps2 that is a pressure of the use side refrigerant in the suction of the use side compressor 62a, and a discharge of the use side compressor 62a A use-side discharge pressure sensor 75a that detects a use-side discharge pressure Pd2 that is the pressure of the use-side refrigerant and a use-side discharge that detects a use-side discharge temperature Td2 that is the temperature of the use-side refrigerant in the discharge of the use-side compressor 62a. A temperature sensor 76a is provided.
　また、ヒートポンプシステム２００には、第１及び第２利用側コントローラの設定や指令によって、以下の運転や各種制御を行う制御部（図示せず）が設けられている。
　＜動作＞
　次に、ヒートポンプシステム２００の動作について説明する。
　ヒートポンプシステム２００の運転としては、第１実施形態のヒートポンプシステム１と同様に、第１利用ユニット４ａの給湯運転（すなわち、貯湯ユニット８ａ及び／又は温水暖房ユニット９ａの運転）のみを行う給湯運転と、第２利用ユニット１０ａ及び／又は第２利用ユニット１０ｂの冷房運転のみを行う冷房運転と、第２利用ユニット１０ａ及び／又は第２利用ユニット１０ｂの暖房運転のみを行う暖房運転と、第１利用ユニット４ａの給湯運転を行うとともに第２利用ユニット１０ａ及び／又は第２利用ユニット１０ｂの暖房運転を行う給湯暖房運転とがある。 The heat pump system 200 is provided with a control unit (not shown) that performs the following operations and various controls according to the settings and commands of the first and second usage-side controllers.
<Operation>
Next, the operation of the heat pump system 200 will be described.
As the operation of the heat pump system 200, similarly to the heat pump system 1 of the first embodiment, a hot water supply operation in which only the hot water supply operation of the first usage unit 4a (that is, the operation of the hot water storage unit 8a and / or the hot water heating unit 9a) is performed. The cooling operation that performs only the cooling operation of the second usage unit 10a and / or the second usage unit 10b, the heating operation that performs only the heating operation of the second usage unit 10a and / or the second usage unit 10b, and the first usage There is a hot water supply and heating operation in which the hot water supply operation of the unit 4a and the heating operation of the second usage unit 10a and / or the second usage unit 10b are performed.
　以下、ヒートポンプシステム２００の４つの運転における動作について説明する。
　－給湯運転－
　第１利用ユニット４ａの給湯運転のみを行う場合には、熱源側冷媒回路２０においては、熱源側切換機構２３が熱源側蒸発運転状態（図３の熱源側切換機構２３の破線で示された状態）に切り換えられ、吸入戻し膨張弁２６ａ及び第２利用側流量調節弁１０２ａ、１０２ｂが閉止された状態になる。また、水媒体回路８０ａにおいては、水媒体切換機構１６１ａが貯湯ユニット８ａ及び／又は温水暖房ユニット９ａに水媒体を供給する状態に切り換えられる。ここでは、第２利用側コントローラ１０８ａ、１０８ｂのうちの１つによって、温調モードとしての熱源側切換機構２３の切換状態を熱源側蒸発運転状態に切り換えた上で、第１利用側コントローラ７７ａの運転指令によって、第１利用ユニット４ａ（及び、貯湯ユニット８ａ及び／又は温水暖房ユニット９ａ）の運転（給湯運転）が行われる。 Hereinafter, operations in four operations of the heat pump system 200 will be described.
-Hot water operation-
When only the hot water supply operation of the first usage unit 4a is performed, in the heat source side refrigerant circuit 20, the heat source side switching mechanism 23 is in the heat source side evaporation operation state (the state indicated by the broken line of the heat source side switching mechanism 23 in FIG. 3). ), And the suction return expansion valve 26a and the second usage side flow rate adjustment valves 102a, 102b are closed. In the aqueous medium circuit 80a, the aqueous medium switching mechanism 161a is switched to a state in which the aqueous medium is supplied to the hot water storage unit 8a and / or the hot water heating unit 9a. Here, the switching state of the heat source side switching mechanism 23 as the temperature control mode is switched to the heat source side evaporation operation state by one of the second usage side controllers 108a and 108b, and then the first usage side controller 77a. The operation (hot water supply operation) of the first usage unit 4a (and the hot water storage unit 8a and / or the hot water heating unit 9a) is performed according to the operation command.
　このような状態の熱源側冷媒回路２０において、冷凍サイクルにおける低圧の熱源側冷媒は、熱源側吸入管２１ｃを通じて、熱源側圧縮機２１に吸入され、冷凍サイクルにおける高圧まで圧縮された後に、熱源側吐出管２１ｂに吐出される。熱源側吐出管２１ｂに吐出された高圧の熱源側冷媒は、油分離器２２ａにおいて冷凍機油が分離される。油分離器２２ａにおいて熱源側冷媒から分離された冷凍機油は、油戻し管２２ｂを通じて、熱源側吸入管２１ｃに戻される。冷凍機油が分離された高圧の熱源側冷媒は、熱源側切換機構２３、第２熱源側ガス冷媒管２３ｂ及びガス側閉鎖弁３０を通じて、熱源ユニット２からガス冷媒連絡管１４に送られる。
　ガス冷媒連絡管１４に送られた高圧の熱源側冷媒は、第１利用ユニット４ａに送られる。第１利用ユニット４ａに送られた高圧の熱源側冷媒は、第１利用側ガス冷媒管５４ａを通じて、第１利用側熱交換器４１ａに送られる。第１利用側熱交換器４１ａに送られた高圧の熱源側冷媒は、第１利用側熱交換器４１ａにおいて、利用側冷媒回路４０ａを循環する冷凍サイクルにおける低圧の利用側冷媒と熱交換を行って放熱する。第１利用側熱交換器４１ａにおいて放熱した高圧の熱源側冷媒は、第１利用側流量調節弁４２ａ及び第１利用側液冷媒管４５ａを通じて、第１利用ユニット４ａから液冷媒連絡管１３に送られる。 In the heat source side refrigerant circuit 20 in such a state, the low pressure heat source side refrigerant in the refrigeration cycle is sucked into the heat source side compressor 21 through the heat source side suction pipe 21c and compressed to a high pressure in the refrigeration cycle, and then the heat source side refrigerant circuit 20 is cooled. It is discharged to the discharge pipe 21b. The high pressure heat source side refrigerant discharged to the heat source side discharge pipe 21b is separated from the refrigerating machine oil in the oil separator 22a. The refrigerating machine oil separated from the heat source side refrigerant in the oil separator 22a is returned to the heat source side suction pipe 21c through the oil return pipe 22b. The high-pressure heat source side refrigerant from which the refrigerating machine oil is separated is sent from the heat source unit 2 to the gas refrigerant communication tube 14 through the heat source side switching mechanism 23, the second heat source side gas refrigerant tube 23b, and the gas side shut-off valve 30.
The high-pressure heat-source-side refrigerant sent to the gas refrigerant communication tube 14 is sent to the first usage unit 4a. The high-pressure heat-source-side refrigerant sent to the first usage unit 4a is sent to the first usage-side heat exchanger 41a through the first usage-side gas refrigerant tube 54a. The high-pressure heat-source-side refrigerant sent to the first usage-side heat exchanger 41a exchanges heat with the low-pressure usage-side refrigerant in the refrigeration cycle circulating in the usage-side refrigerant circuit 40a in the first usage-side heat exchanger 41a. To dissipate heat. The high-pressure heat-source-side refrigerant radiated in the first usage-side heat exchanger 41a is sent from the first usage unit 4a to the liquid refrigerant communication tube 13 through the first usage-side flow rate adjustment valve 42a and the first usage-side liquid refrigerant tube 45a. It is done.
　液冷媒連絡管１３に送られた熱源側冷媒は、熱源ユニット２に送られる。熱源ユニット２に送られた熱源側冷媒は、液側閉鎖弁２９を通じて、過冷却器２７に送られる。過冷却器２７に送られた熱源側冷媒は、吸入戻し管２６に熱源側冷媒が流れていないため、熱交換を行うことなく、熱源側膨張弁２５に送られる。熱源側膨張弁２５に送られた熱源側冷媒は、熱源側膨張弁２５において減圧されて、低圧の気液二相状態になり、熱源側液冷媒管２４ａを通じて、熱源側熱交換器２４に送られる。熱源側熱交換器２４に送られた低圧の冷媒は、熱源側熱交換器２４において、熱源側ファン３２によって供給される室外空気と熱交換を行って蒸発する。熱源側熱交換器２４において蒸発した低圧の熱源側冷媒は、第１熱源側ガス冷媒管２３ａ及び熱源側切換機構２３を通じて、熱源側アキュムレータ２８に送られる。熱源側アキュムレータ２８に送られた低圧の熱源側冷媒は、熱源側吸入管２１ｃを通じて、再び、熱源側圧縮機２１に吸入される。 The heat source side refrigerant sent to the liquid refrigerant communication tube 13 is sent to the heat source unit 2. The heat source side refrigerant sent to the heat source unit 2 is sent to the supercooler 27 through the liquid side shut-off valve 29. The heat source side refrigerant sent to the subcooler 27 is sent to the heat source side expansion valve 25 without performing heat exchange because the heat source side refrigerant does not flow through the suction return pipe 26. The heat source side refrigerant sent to the heat source side expansion valve 25 is depressurized by the heat source side expansion valve 25 to be in a low-pressure gas-liquid two-phase state, and sent to the heat source side heat exchanger 24 through the heat source side liquid refrigerant tube 24a. It is done. The low-pressure refrigerant sent to the heat source side heat exchanger 24 evaporates by exchanging heat with outdoor air supplied by the heat source side fan 32 in the heat source side heat exchanger 24. The low-pressure heat source side refrigerant evaporated in the heat source side heat exchanger 24 is sent to the heat source side accumulator 28 through the first heat source side gas refrigerant tube 23a and the heat source side switching mechanism 23. The low-pressure heat source side refrigerant sent to the heat source side accumulator 28 is again sucked into the heat source side compressor 21 through the heat source side suction pipe 21c.
　一方、利用側冷媒回路４０ａにおいては、第１利用側熱交換器４１ａにおける熱源側冷媒の放熱によって利用側冷媒回路４０ａを循環する冷凍サイクルにおける低圧の利用側冷媒が加熱されて蒸発する。第１利用側熱交換器４１ａにおいて蒸発した低圧の利用側冷媒は、第２カスケード側ガス冷媒管６９ａを通じて、利用側アキュムレータ６７ａに送られる。利用側アキュムレータ６７ａに送られた低圧の利用側冷媒は、カスケード側吸入管７１ａを通じて、利用側圧縮機６２ａに吸入され、冷凍サイクルにおける高圧まで圧縮された後に、カスケード側吐出管７０ａに吐出される。カスケード側吐出管７０ａに吐出された高圧の利用側冷媒は、第１カスケード側ガス冷媒管７２ａを通じて、冷媒－水熱交換器６５ａに送られる。冷媒－水熱交換器６５ａに送られた高圧の利用側冷媒は、冷媒－水熱交換器６５ａにおいて、循環ポンプ４３ａによって水媒体回路８０ａを循環する水媒体と熱交換を行って放熱する。冷媒－水熱交換器６５ａにおいて放熱した高圧の利用側冷媒は、冷媒－水熱交側流量調節弁６６ａにおいて減圧されて、低圧の気液二相状態になり、カスケード側液冷媒管６８ａを通じて、再び、第１利用側熱交換器４１ａに送られる。 On the other hand, in the usage-side refrigerant circuit 40a, the low-pressure usage-side refrigerant in the refrigeration cycle circulating in the usage-side refrigerant circuit 40a is heated and evaporated by the heat radiation of the heat source-side refrigerant in the first usage-side heat exchanger 41a. The low-pressure usage-side refrigerant evaporated in the first usage-side heat exchanger 41a is sent to the usage-side accumulator 67a through the second cascade-side gas refrigerant tube 69a. The low-pressure use-side refrigerant sent to the use-side accumulator 67a is sucked into the use-side compressor 62a through the cascade-side suction pipe 71a, compressed to a high pressure in the refrigeration cycle, and then discharged to the cascade-side discharge pipe 70a. . The high-pressure use-side refrigerant discharged to the cascade-side discharge pipe 70a is sent to the refrigerant-water heat exchanger 65a through the first cascade-side gas refrigerant pipe 72a. The high-pressure use-side refrigerant sent to the refrigerant-water heat exchanger 65a radiates heat by exchanging heat with the aqueous medium circulating in the aqueous medium circuit 80a by the circulation pump 43a in the refrigerant-water heat exchanger 65a. The high-pressure use-side refrigerant that has radiated heat in the refrigerant-water heat exchanger 65a is decompressed in the refrigerant-water heat exchange side flow rate control valve 66a to become a low-pressure gas-liquid two-phase state, and passes through the cascade-side liquid refrigerant pipe 68a. Again, it is sent to the 1st utilization side heat exchanger 41a.
　また、水媒体回路８０ａにおいては、冷媒－水熱交換器６５ａにおける利用側冷媒の放熱によって水媒体回路８０ａを循環する水媒体が加熱される。冷媒－水熱交換器６５ａにおいて加熱された水媒体は、第１利用側水出口管４８ａを通じて、循環ポンプ４３ａに吸入され、昇圧された後に、第１利用ユニット４ａから水媒体連絡管１６ａに送られる。貯湯ユニット８ａに送られた水媒体は、熱交換コイル８２ａにおいて貯湯タンク８１ａ内の水媒体と熱交換を行って放熱し、これにより、貯湯タンク８１ａ内の水媒体を加熱する。温水暖房ユニット９ａに送られた水媒体は、熱交換パネル９１ａにおいて放熱し、これにより、室内の壁際等を加熱したり室内の床を加熱する。
　このようにして、第１利用ユニット４ａの給湯運転のみを行う給湯運転における動作が行われる。 In the aqueous medium circuit 80a, the aqueous medium circulating in the aqueous medium circuit 80a is heated by the heat radiation of the use-side refrigerant in the refrigerant-water heat exchanger 65a. The aqueous medium heated in the refrigerant-water heat exchanger 65a is drawn into the circulation pump 43a through the first usage-side water outlet pipe 48a, and after being pressurized, is sent from the first usage unit 4a to the aqueous medium communication pipe 16a. It is done. The aqueous medium sent to the hot water storage unit 8a exchanges heat with the aqueous medium in the hot water storage tank 81a in the heat exchange coil 82a to radiate heat, thereby heating the aqueous medium in the hot water storage tank 81a. The aqueous medium sent to the hot water heating unit 9a dissipates heat in the heat exchange panel 91a, thereby heating the indoor wall or the like or heating the indoor floor.
Thus, the operation | movement in the hot water supply operation which performs only the hot water supply operation of the 1st utilization unit 4a is performed.
　－冷房運転－
　第２利用ユニット１０ａ及び／又は第２利用ユニット１０ｂの冷房運転のみを行う場合には、熱源側冷媒回路２０においては、熱源側切換機構２３が熱源側放熱運転状態（図３の熱源側切換機構２３の実線で示された状態）に切り換えられ、第１利用側流量調節弁４２ａが閉止された状態になる。ここでは、第２利用側コントローラ１０８ａ、１０８ｂのうちの１つによって、温調モードとしての熱源側切換機構２３の切換状態を熱源側放熱運転状態に切り換えた上で、第２利用側コントローラ１０８ａ及び／又は第２利用側コントローラ１０８ｂの運転指令によって、第２利用ユニット１０ａ及び／又は第２利用ユニット１０ｂの運転（冷房運転）が行われる。尚、冷房運転については、第１実施形態のヒートポンプシステム１における冷房運転と同様であるため、ここでは説明を省略する。 -Cooling operation-
When only the cooling operation of the second usage unit 10a and / or the second usage unit 10b is performed, in the heat source side refrigerant circuit 20, the heat source side switching mechanism 23 is in the heat source side heat radiation operation state (the heat source side switching mechanism of FIG. 3). 23, the first use side flow rate adjustment valve 42a is closed. Here, after switching the switching state of the heat source side switching mechanism 23 as the temperature control mode to the heat source side heat radiation operation state by one of the second usage side controllers 108a and 108b, the second usage side controller 108a and The operation (cooling operation) of the second usage unit 10a and / or the second usage unit 10b is performed according to the operation command of the second usage side controller 108b. Since the cooling operation is the same as the cooling operation in the heat pump system 1 of the first embodiment, the description thereof is omitted here.
　－暖房運転－
　第２利用ユニット１０ａ及び／又は第２利用ユニット１０ｂの暖房運転のみを行う場合には、熱源側冷媒回路２０においては、熱源側切換機構２３が熱源側放熱運転状態（図３の熱源側切換機構２３の破線で示された状態）に切り換えられ、吸入戻し膨張弁２６ａ及び第１利用側流量調節弁４２ａが閉止された状態になる。ここでは、第２利用側コントローラ１０８ａ、１０８ｂのうちの１つによって、温調モードとしての熱源側切換機構２３の切換状態を熱源側蒸発運転状態に切り換えた上で、第２利用側コントローラ１０８ａ及び／又は第２利用側コントローラ１０８ｂの運転指令によって、第２利用ユニット１０ａ及び／又は第２利用ユニット１０ｂの運転（暖房運転）が行われる。尚、暖房運転については、第１実施形態のヒートポンプシステム１における暖房運転と同様であるため、ここでは説明を省略する。 -Heating operation-
When only the heating operation of the second usage unit 10a and / or the second usage unit 10b is performed, in the heat source side refrigerant circuit 20, the heat source side switching mechanism 23 is in the heat source side heat radiation operation state (the heat source side switching mechanism in FIG. 3). 23, the suction return expansion valve 26a and the first usage-side flow rate adjustment valve 42a are closed. Here, after switching the switching state of the heat source side switching mechanism 23 as the temperature control mode to the heat source side evaporation operation state by one of the second usage side controllers 108a and 108b, the second usage side controller 108a and The operation (heating operation) of the second usage unit 10a and / or the second usage unit 10b is performed according to the operation command of the second usage side controller 108b. Since the heating operation is the same as the heating operation in the heat pump system 1 of the first embodiment, the description thereof is omitted here.
　－給湯暖房運転－
　第１利用ユニット４ａの給湯運転を行うとともに第２利用ユニット１０ａ及び／又は第２利用ユニット１０ｂの暖房運転を行う場合には、熱源側冷媒回路２０においては、熱源側切換機構２３が熱源側蒸発運転状態（図３の熱源側切換機構２３の破線で示された状態）に切り換えられ、吸入戻し膨張弁２６ａが閉止された状態になる。また、水媒体回路８０ａにおいては、水媒体切換機構１６１ａが貯湯ユニット８ａ及び／又は温水暖房ユニット９ａに水媒体を供給する状態に切り換えられる。ここでは、第２利用側コントローラ１０８ａ、１０８ｂのうちの１つによって、温調モードとしての熱源側切換機構２３の切換状態を熱源側蒸発運転状態に切り換えた上で、第１利用側コントローラ７７ａの運転指令によって、第１利用ユニット４ａ（及び、貯湯ユニット８ａ及び／又は温水暖房ユニット９ａ）の運転（給湯運転）と、第２利用側コントローラ１０８ａ及び／又は第２利用側コントローラ１０８ｂの運転指令によって、第２利用ユニット１０ａ及び／又は第２利用ユニット１０ｂの運転（暖房運転）が行われる。 -Hot water heater operation-
When the hot water supply operation of the first usage unit 4a and the heating operation of the second usage unit 10a and / or the second usage unit 10b are performed, in the heat source side refrigerant circuit 20, the heat source side switching mechanism 23 is heat source side evaporation. The operation state is switched to the operation state (the state indicated by the broken line of the heat source side switching mechanism 23 in FIG. 3), and the suction return expansion valve 26a is closed. In the aqueous medium circuit 80a, the aqueous medium switching mechanism 161a is switched to a state in which the aqueous medium is supplied to the hot water storage unit 8a and / or the hot water heating unit 9a. Here, the switching state of the heat source side switching mechanism 23 as the temperature control mode is switched to the heat source side evaporation operation state by one of the second usage side controllers 108a and 108b, and then the first usage side controller 77a. According to the operation command, the operation (hot water supply operation) of the first usage unit 4a (and the hot water storage unit 8a and / or the hot water heating unit 9a) and the operation command of the second usage side controller 108a and / or the second usage side controller 108b The operation (heating operation) of the second usage unit 10a and / or the second usage unit 10b is performed.
　このような状態の熱源側冷媒回路２０において、冷凍サイクルにおける低圧の熱源側冷媒は、熱源側吸入管２１ｃを通じて、熱源側圧縮機２１に吸入され、冷凍サイクルにおける高圧まで圧縮された後に、熱源側吐出管２１ｂに吐出される。熱源側吐出管２１ｂに吐出された高圧の熱源側冷媒は、油分離器２２ａにおいて冷凍機油が分離される。油分離器２２ａにおいて熱源側冷媒から分離された冷凍機油は、油戻し管２２ｂを通じて、熱源側吸入管２１ｃに戻される。冷凍機油が分離された高圧の熱源側冷媒は、熱源側切換機構２３、第２熱源側ガス冷媒管２３ｂ及びガス側閉鎖弁３０を通じて、熱源ユニット２からガス冷媒連絡管１４に送られる。
　ガス冷媒連絡管１４に送られた高圧の熱源側冷媒は、第１利用ユニット４ａ及び第２利用ユニット１０ａ、１０ｂ（ここでは、第２利用ユニット１０ａ、１０ｂの両方を暖房運転するものとして説明する）に送られる。 In the heat source side refrigerant circuit 20 in such a state, the low pressure heat source side refrigerant in the refrigeration cycle is sucked into the heat source side compressor 21 through the heat source side suction pipe 21c and compressed to a high pressure in the refrigeration cycle, and then the heat source side refrigerant circuit 20 is cooled. It is discharged to the discharge pipe 21b. The high pressure heat source side refrigerant discharged to the heat source side discharge pipe 21b is separated from the refrigerating machine oil in the oil separator 22a. The refrigerating machine oil separated from the heat source side refrigerant in the oil separator 22a is returned to the heat source side suction pipe 21c through the oil return pipe 22b. The high-pressure heat source side refrigerant from which the refrigerating machine oil is separated is sent from the heat source unit 2 to the gas refrigerant communication tube 14 through the heat source side switching mechanism 23, the second heat source side gas refrigerant tube 23b, and the gas side shut-off valve 30.
The high-pressure heat-source-side refrigerant sent to the gas refrigerant communication tube 14 will be described on the assumption that the first usage unit 4a and the second usage units 10a and 10b (here, both the second usage units 10a and 10b are heated). ).
　第２利用ユニット１０ａ、１０ｂに送られた高圧の熱源側冷媒は、第２利用側ガス冷媒管１０４ａ、１０４ｂを通じて、第２利用側熱交換器１０１ａ、１０１ｂに送られる。第２利用側熱交換器１０１ａ、１０１ｂに送られた高圧の熱源側冷媒は、第２利用側熱交換器１０１ａ、１０１ｂにおいて、利用側ファン１０５ａ、１０５ｂによって供給される空気媒体と熱交換を行って放熱し、これにより、室内の暖房を行う。第２利用側熱交換器１０１ａ、１０１ｂにおいて放熱した高圧の熱源側冷媒は、第２利用側流量調節弁１０２ａ、１０２ｂ及び第２利用側液冷媒管１０３ａ、１０３ｂを通じて、第２利用ユニット１０ａ、１０ｂから液冷媒連絡管１３に送られる。
　第１利用ユニット４ａに送られた高圧の熱源側冷媒は、第１利用側ガス冷媒管５４ａを通じて、第１利用側熱交換器４１ａに送られる。第１利用側熱交換器４１ａに送られた高圧の熱源側冷媒は、第１利用側熱交換器４１ａにおいて、利用側冷媒回路４０ａを循環する冷凍サイクルにおける低圧の利用側冷媒と熱交換を行って放熱する。第１利用側熱交換器４１ａにおいて放熱した高圧の熱源側冷媒は、第１利用側流量調節弁４２ａ及び第１利用側液冷媒管４５ａを通じて、第１利用ユニット４ａから液冷媒連絡管１３に送られる。 The high-pressure heat-source-side refrigerant sent to the second usage units 10a, 10b is sent to the second usage- side heat exchangers 101a, 101b through the second usage-side gas refrigerant tubes 104a, 104b. The high-pressure heat-source-side refrigerant sent to the second usage- side heat exchangers 101a and 101b exchanges heat with the air medium supplied by the usage- side fans 105a and 105b in the second usage- side heat exchangers 101a and 101b. To dissipate heat, thereby heating the room. The high-pressure heat-source-side refrigerant radiated in the second usage- side heat exchangers 101a and 101b passes through the second usage-side flow rate adjustment valves 102a and 102b and the second usage-side liquid refrigerant tubes 103a and 103b, and the second usage units 10a and 10b. To the liquid refrigerant communication tube 13.
The high-pressure heat-source-side refrigerant sent to the first usage unit 4a is sent to the first usage-side heat exchanger 41a through the first usage-side gas refrigerant tube 54a. The high-pressure heat-source-side refrigerant sent to the first usage-side heat exchanger 41a exchanges heat with the low-pressure usage-side refrigerant in the refrigeration cycle circulating in the usage-side refrigerant circuit 40a in the first usage-side heat exchanger 41a. To dissipate heat. The high-pressure heat-source-side refrigerant radiated in the first usage-side heat exchanger 41a is sent from the first usage unit 4a to the liquid refrigerant communication tube 13 through the first usage-side flow rate adjustment valve 42a and the first usage-side liquid refrigerant tube 45a. It is done.
　第２利用ユニット１０ａ、１０ｂ及び第１利用ユニット４ａから液冷媒連絡管１３に送られた熱源側冷媒は、液冷媒連絡管１３において合流して、熱源ユニット２に送られる。熱源ユニット２に送られた熱源側冷媒は、液側閉鎖弁２９を通じて、過冷却器２７に送られる。過冷却器２７に送られた熱源側冷媒は、吸入戻し管２６に熱源側冷媒が流れていないため、熱交換を行うことなく、熱源側膨張弁２５に送られる。熱源側膨張弁２５に送られた熱源側冷媒は、熱源側膨張弁２５において減圧されて、低圧の気液二相状態になり、熱源側液冷媒管２４ａを通じて、熱源側熱交換器２４に送られる。熱源側熱交換器２４に送られた低圧の冷媒は、熱源側熱交換器２４において、熱源側ファン３２によって供給される室外空気と熱交換を行って蒸発する。熱源側熱交換器２４において蒸発した低圧の熱源側冷媒は、第１熱源側ガス冷媒管２３ａ及び熱源側切換機構２３を通じて、熱源側アキュムレータ２８に送られる。熱源側アキュムレータ２８に送られた低圧の熱源側冷媒は、熱源側吸入管２１ｃを通じて、再び、熱源側圧縮機２１に吸入される。 The heat-source-side refrigerant sent from the second usage units 10a and 10b and the first usage unit 4a to the liquid refrigerant communication tube 13 merges in the liquid refrigerant communication tube 13 and is sent to the heat source unit 2. The heat source side refrigerant sent to the heat source unit 2 is sent to the supercooler 27 through the liquid side shut-off valve 29. The heat source side refrigerant sent to the subcooler 27 is sent to the heat source side expansion valve 25 without performing heat exchange because the heat source side refrigerant does not flow through the suction return pipe 26. The heat source side refrigerant sent to the heat source side expansion valve 25 is depressurized by the heat source side expansion valve 25 to be in a low-pressure gas-liquid two-phase state, and sent to the heat source side heat exchanger 24 through the heat source side liquid refrigerant tube 24a. It is done. The low-pressure refrigerant sent to the heat source side heat exchanger 24 evaporates by exchanging heat with outdoor air supplied by the heat source side fan 32 in the heat source side heat exchanger 24. The low-pressure heat source side refrigerant evaporated in the heat source side heat exchanger 24 is sent to the heat source side accumulator 28 through the first heat source side gas refrigerant tube 23a and the heat source side switching mechanism 23. The low-pressure heat source side refrigerant sent to the heat source side accumulator 28 is again sucked into the heat source side compressor 21 through the heat source side suction pipe 21c.
　一方、利用側冷媒回路４０ａにおいては、第１利用側熱交換器４１ａにおける熱源側冷媒の放熱によって利用側冷媒回路４０ａを循環する冷凍サイクルにおける低圧の利用側冷媒が加熱されて蒸発する。第１利用側熱交換器４１ａにおいて蒸発した低圧の利用側冷媒は、第２カスケード側ガス冷媒管６９ａを通じて、利用側アキュムレータ６７ａに送られる。利用側アキュムレータ６７ａに送られた低圧の利用側冷媒は、カスケード側吸入管７１ａを通じて、利用側圧縮機６２ａに吸入され、冷凍サイクルにおける高圧まで圧縮された後に、カスケード側吐出管７０ａに吐出される。カスケード側吐出管７０ａに吐出された高圧の利用側冷媒は、第１カスケード側ガス冷媒管７２ａを通じて、冷媒－水熱交換器６５ａに送られる。冷媒－水熱交換器６５ａに送られた高圧の利用側冷媒は、冷媒－水熱交換器６５ａにおいて、循環ポンプ４３ａによって水媒体回路８０ａを循環する水媒体と熱交換を行って放熱する。冷媒－水熱交換器６５ａにおいて放熱した高圧の利用側冷媒は、冷媒－水熱交側流量調節弁６６ａにおいて減圧されて、低圧の気液二相状態になり、カスケード側液冷媒管６８ａを通じて、再び、第１利用側熱交換器４１ａに送られる。 On the other hand, in the usage-side refrigerant circuit 40a, the low-pressure usage-side refrigerant in the refrigeration cycle circulating in the usage-side refrigerant circuit 40a is heated and evaporated by the heat radiation of the heat source-side refrigerant in the first usage-side heat exchanger 41a. The low-pressure usage-side refrigerant evaporated in the first usage-side heat exchanger 41a is sent to the usage-side accumulator 67a through the second cascade-side gas refrigerant tube 69a. The low-pressure use-side refrigerant sent to the use-side accumulator 67a is sucked into the use-side compressor 62a through the cascade-side suction pipe 71a, compressed to a high pressure in the refrigeration cycle, and then discharged to the cascade-side discharge pipe 70a. . The high-pressure use-side refrigerant discharged to the cascade-side discharge pipe 70a is sent to the refrigerant-water heat exchanger 65a through the first cascade-side gas refrigerant pipe 72a. The high-pressure use-side refrigerant sent to the refrigerant-water heat exchanger 65a radiates heat by exchanging heat with the aqueous medium circulating in the aqueous medium circuit 80a by the circulation pump 43a in the refrigerant-water heat exchanger 65a. The high-pressure use-side refrigerant that has radiated heat in the refrigerant-water heat exchanger 65a is decompressed in the refrigerant-water heat exchange side flow rate control valve 66a to become a low-pressure gas-liquid two-phase state, and passes through the cascade-side liquid refrigerant pipe 68a. Again, it is sent to the 1st utilization side heat exchanger 41a.
　また、水媒体回路８０ａにおいては、冷媒－水熱交換器６５ａにおける利用側冷媒の放熱によって水媒体回路８０ａを循環する水媒体が加熱される。冷媒－水熱交換器６５ａにおいて加熱された水媒体は、第１利用側水出口管４８ａを通じて、循環ポンプ４３ａに吸入され、昇圧された後に、第１利用ユニット４ａから水媒体連絡管１６ａに送られる。貯湯ユニット８ａに送られた水媒体は、熱交換コイル８２ａにおいて貯湯タンク８１ａ内の水媒体と熱交換を行って放熱し、これにより、貯湯タンク８１ａ内の水媒体を加熱する。温水暖房ユニット９ａに送られた水媒体は、熱交換パネル９１ａにおいて放熱し、これにより、室内の壁際等を加熱したり室内の床を加熱する。
　このようにして、第１利用ユニット４ａの給湯運転を行うとともに第２利用ユニット１０ａ及び／又は第２利用ユニット１０ｂの暖房運転を行う給湯暖房運転における動作が行われる。 In the aqueous medium circuit 80a, the aqueous medium circulating in the aqueous medium circuit 80a is heated by the heat radiation of the use-side refrigerant in the refrigerant-water heat exchanger 65a. The aqueous medium heated in the refrigerant-water heat exchanger 65a is drawn into the circulation pump 43a through the first usage-side water outlet pipe 48a, and after being pressurized, is sent from the first usage unit 4a to the aqueous medium communication pipe 16a. It is done. The aqueous medium sent to the hot water storage unit 8a exchanges heat with the aqueous medium in the hot water storage tank 81a in the heat exchange coil 82a to radiate heat, thereby heating the aqueous medium in the hot water storage tank 81a. The aqueous medium sent to the hot water heating unit 9a dissipates heat in the heat exchange panel 91a, thereby heating the indoor wall or the like or heating the indoor floor.
In this way, the hot water supply operation of the first usage unit 4a and the heating operation of the second usage unit 10a and / or the second usage unit 10b are performed.
　このように、このヒートポンプシステム２００では、第１実施形態のヒートポンプシステム１と同様に、温調モードを熱源側放熱運転状態に切り換えたままでは、給湯運転や暖房運転を行うことができず、また、温調モードを熱源側蒸発運転状態に切り換えたままでは、冷房運転を行うことができない。すなわち、第１利用ユニット４ａ及び第２利用ユニット１０ａ、１０ｂにおいて所望の運転を行うためには、第１利用側コントローラ７７ａから第１利用ユニット４ａへの給湯運転の指令や第２利用側コントローラ１０８ａ、１０８ｂから第２利用ユニット１０ａ、１０ｂへの冷房運転又は暖房運転の指令だけでなく、第１及び第２利用ユニット４ａ、１０ａ、１０ｂに共通の熱源ユニット２における運転状態を決定する熱源側切換機構２３の切換状態である温調モードの切り換えが必要であり、その意味において、このヒートポンプシステム２００は、第１利用ユニット４ａ及び第２利用ユニット１０ａ、１０ｂが個別に給湯運転、冷房運転又は暖房運転を選択して運転できないものとなっている。 Thus, in this heat pump system 200, as in the heat pump system 1 of the first embodiment, the hot water supply operation and the heating operation cannot be performed without switching the temperature control mode to the heat source side heat radiation operation state. If the temperature control mode is switched to the heat source side evaporation operation state, the cooling operation cannot be performed. That is, in order to perform a desired operation in the first usage unit 4a and the second usage unit 10a, 10b, a hot water supply operation command from the first usage side controller 77a to the first usage unit 4a or a second usage side controller 108a. , 108b to the second usage units 10a and 10b, not only the cooling operation or heating operation command, but also the heat source side switching for determining the operating state in the heat source unit 2 common to the first and second usage units 4a, 10a and 10b It is necessary to switch the temperature control mode, which is the switching state of the mechanism 23. In this sense, the heat pump system 200 has the first usage unit 4a and the second usage unit 10a, 10b individually supplied with hot water, cooling or heating. You can not drive by selecting driving.
　そして、このヒートポンプシステム２００においても、第１実施形態のヒートポンプシステム１と同様に、第２利用ユニット１０ａ、１０ｂに指令を行う第２利用側コントローラ１０８ａ、１０８ｂのうちの１つ（ここでは、第２利用側コントローラ１０８ａとする）が指令している温調モードとしての熱源側切換機構２３の切換状態とは異なる温調モードに切り換えて運転することが可能な温調モード切り換え制御を行うようにしている。尚、温調モード切り換え制御については、第１実施形態のヒートポンプシステム１における温調モード切り換え制御と同様であるため（図２等参照）、ここでは説明を省略する。
　これにより、このヒートポンプシステム２００においても、第１実施形態のヒートポンプシステム１と同様の作用効果を得ることができる。
　（第３実施形態）
　上述の第１実施形態におけるヒートポンプシステム１（図１参照）においては、第１利用ユニット４ａの給湯運転を行うとともに第２利用ユニット１０ａ、１０ｂの冷房運転を行うことができないため、このような運転（以下、「排熱給湯運転」とする）を行うことができれば、夏期等の冷房運転が行われている運転状態において、第２利用側熱交換器１０１ａ、１０１ｂにおける蒸発負荷（すなわち、冷房負荷）に見合う分の第１利用側熱交換器４ａにおける放熱負荷（すなわち、給湯負荷）によって給湯運転を行うことができるようになるため、省エネルギー化の観点から好ましい。 And also in this heat pump system 200, like the heat pump system 1 of the first embodiment, one of the second usage- side controllers 108a, 108b that commands the second usage units 10a, 10b (here, the first Temperature control mode switching control that can be operated by switching to a temperature control mode different from the switching state of the heat source side switching mechanism 23 as the temperature control mode commanded by the 2 use side controller 108a). ing. Since the temperature control mode switching control is the same as the temperature control mode switching control in the heat pump system 1 of the first embodiment (see FIG. 2 and the like), description thereof is omitted here.
Thereby, also in this heat pump system 200, the effect similar to the heat pump system 1 of 1st Embodiment can be acquired.
(Third embodiment)
In the heat pump system 1 (see FIG. 1) in the first embodiment described above, the hot water supply operation of the first usage unit 4a cannot be performed and the cooling operation of the second usage units 10a and 10b cannot be performed. If it can be performed (hereinafter referred to as “exhaust heat hot water supply operation”), the evaporative load (that is, the cooling load) in the second usage- side heat exchangers 101a and 101b in the operation state in which the cooling operation is performed such as summer. ), The hot water supply operation can be performed by the heat radiation load (that is, the hot water supply load) in the first usage-side heat exchanger 4a, which is preferable from the viewpoint of energy saving.
　そこで、このヒートポンプシステム３００では、上述の第１実施形態にかかるヒートポンプシステム１（図１参照）の構成において、図４に示されるように、第２利用側熱交換器１０１ａ、１０１ｂを熱源側冷媒の蒸発器として機能させることで空気媒体を冷却するとともに、第１利用側熱交換器４１ａを熱源側冷媒の放熱器として機能させることで水媒体を加熱する運転である排熱給湯運転を行うことができるようにしている。以下、このヒートポンプシステム３００の構成について説明する。
　＜構成＞
　－全体－
　図４は、本発明の第３実施形態にかかるヒートポンプシステム３００の概略構成図である。ヒートポンプシステム３００は、蒸気圧縮式のヒートポンプサイクルを利用して水媒体を加熱する運転等を行うことが可能な装置である。 Therefore, in the heat pump system 300, in the configuration of the heat pump system 1 (see FIG. 1) according to the first embodiment described above, as shown in FIG. 4, the second usage side heat exchangers 101a and 101b are replaced with the heat source side refrigerant. The air medium is cooled by functioning as an evaporator, and the exhaust heat hot water supply operation, which is an operation for heating the aqueous medium, is performed by causing the first use side heat exchanger 41a to function as a radiator of the heat source side refrigerant. To be able to. Hereinafter, the configuration of the heat pump system 300 will be described.
<Configuration>
-The entire-
FIG. 4 is a schematic configuration diagram of a heat pump system 300 according to the third embodiment of the present invention. The heat pump system 300 is an apparatus capable of performing an operation for heating an aqueous medium using a vapor compression heat pump cycle.
　ヒートポンプシステム３００は、主として、熱源ユニット２と、第１利用ユニット４ａと、第２利用ユニット１０ａ、１０ｂと、吐出冷媒連絡管１２と、液冷媒連絡管１３と、ガス冷媒連絡管１４と、貯湯ユニット８ａと、温水暖房ユニット９ａと、水媒体連絡管１５ａと、水媒体連絡管１６ａとを備えており、熱源ユニット２と第１利用ユニット４ａと第２利用ユニット１０ａとが冷媒連絡管１２、１３、１４を介して接続されることによって、熱源側冷媒回路２０を構成し、第１利用ユニット４ａが利用側冷媒回路４０ａを構成し、第１利用ユニット４ａと貯湯ユニット８ａと温水暖房ユニット９ａとが水媒体連絡管１５ａ、１６ａを介して接続されることによって、水媒体回路８０ａを構成している。熱源側冷媒回路２０には、ＨＦＣ系冷媒の一種であるＨＦＣ－４１０Ａが熱源側冷媒として封入されており、また、ＨＦＣ系冷媒に対して相溶性を有するエステル系又はエーテル系の冷凍機油が熱源側圧縮機２１の潤滑のために封入されている。また、利用側冷媒回路４０ａには、ＨＦＣ系冷媒の一種であるＨＦＣ－１３４ａが利用側冷媒として封入されており、また、ＨＦＣ系冷媒に対して相溶性を有するエステル系又はエーテル系の冷凍機油が利用側圧縮機６２ａの潤滑のために封入されている。尚、利用側冷媒としては、高温の冷凍サイクルに有利な冷媒を使用されるという観点から、飽和ガス温度６５℃に相当する圧力がゲージ圧で高くとも２．８ＭＰａ以下、好ましくは、２．０ＭＰａ以下の冷媒を使用することが好ましい。そして、ＨＦＣ－１３４ａは、このような飽和圧力特性を有する冷媒の一種である。また、水媒体回路８０ａには、水媒体としての水が循環するようになっている。 The heat pump system 300 mainly includes a heat source unit 2, a first usage unit 4a, second usage units 10a and 10b, a discharge refrigerant communication tube 12, a liquid refrigerant communication tube 13, a gas refrigerant communication tube 14, and hot water storage. The unit 8a, the hot water heating unit 9a, the aqueous medium communication pipe 15a, and the aqueous medium communication pipe 16a are provided, and the heat source unit 2, the first usage unit 4a, and the second usage unit 10a are connected to the refrigerant communication pipe 12, 13 and 14 constitutes the heat source side refrigerant circuit 20, the first usage unit 4a constitutes the usage side refrigerant circuit 40a, the first usage unit 4a, the hot water storage unit 8a, and the hot water heating unit 9a. Are connected via the aqueous medium communication pipes 15a and 16a to constitute an aqueous medium circuit 80a. In the heat source side refrigerant circuit 20, HFC-410A, which is a kind of HFC refrigerant, is sealed as a heat source refrigerant, and an ester or ether refrigerating machine oil compatible with the HFC refrigerant is used as the heat source. It is enclosed for lubrication of the side compressor 21. Further, HFC-134a, which is a kind of HFC refrigerant, is sealed in the use side refrigerant circuit 40a as a use side refrigerant, and ester or ether type refrigerating machine oil having compatibility with the HFC refrigerant. Is enclosed for lubrication of the use side compressor 62a. In addition, as a use side refrigerant | coolant, from a viewpoint that the refrigerant | coolant advantageous to a high temperature refrigerating cycle is used, the pressure corresponding to saturation gas temperature 65 degreeC is 2.8 Mpa or less at a gauge pressure at most, Preferably, it is 2.0 Mpa The following refrigerants are preferably used. HFC-134a is a kind of refrigerant having such saturation pressure characteristics. Further, water as an aqueous medium circulates in the aqueous medium circuit 80a.
　尚、以下の構成に関する説明では、第１実施形態におけるヒートポンプシステム１（図１参照）と同様の構成を有する第２利用ユニット１０ａ、１０ｂ、貯湯ユニット８ａ、温水暖房ユニット９ａ、液冷媒連絡管１３、ガス冷媒連絡管１４、水媒体連絡管１５ａ、１６ａ、第１利用側コントローラ７７ａ、及び、第２利用側コントローラ１０８ａ、１０８ｂの構成については、同じ符号を付して説明を省略し、熱源ユニット２、吐出冷媒連絡管１２、及び、第１利用ユニット４ａの構成のみについて説明を行う。
　－熱源ユニット－
　熱源ユニット２は、屋外に設置されており、冷媒連絡管１２、１３、１４を介して利用ユニット４ａ、１０ａに接続されており、熱源側冷媒回路２０の一部を構成している。
　熱源ユニット２は、主として、熱源側圧縮機２１と、油分離機構２２と、熱源側切換機構２３と、熱源側熱交換器２４と、熱源側膨張機構２５と、吸入戻し管２６と、過冷却器２７と、熱源側アキュムレータ２８と、液側閉鎖弁２９と、ガス側閉鎖弁３０と、吐出側閉鎖弁３１とを有している。 In the following description of the configuration, the second usage units 10a and 10b, the hot water storage unit 8a, the hot water heating unit 9a, and the liquid refrigerant communication tube 13 having the same configuration as the heat pump system 1 (see FIG. 1) in the first embodiment. The configuration of the gas refrigerant communication pipe 14, the aqueous medium communication pipes 15a and 16a, the first usage-side controller 77a, and the second usage- side controllers 108a and 108b will be given the same reference numerals, and the description thereof will be omitted. 2, only the configuration of the discharge refrigerant communication tube 12 and the first usage unit 4a will be described.
-Heat source unit-
The heat source unit 2 is installed outdoors and is connected to the utilization units 4 a and 10 a via the refrigerant communication pipes 12, 13 and 14 and constitutes a part of the heat source side refrigerant circuit 20.
The heat source unit 2 mainly includes a heat source side compressor 21, an oil separation mechanism 22, a heat source side switching mechanism 23, a heat source side heat exchanger 24, a heat source side expansion mechanism 25, a suction return pipe 26, and a supercooling. A heat source side accumulator 28, a liquid side closing valve 29, a gas side closing valve 30, and a discharge side closing valve 31.
　ここで、吐出側閉鎖弁３１は、熱源側圧縮機２１の吐出と熱源側切換機構２３とを接続する熱源側吐出管２１ｂから分岐された熱源側吐出分岐管２１ｄとガス冷媒連絡管１４との接続部に設けられた弁である。
　尚、熱源ユニット２は、吐出側閉鎖弁３１及び熱源側吐出分岐管２１ｄを有する点を除いた構成については、第１実施形態におけるヒートポンプシステム１（図１参照）と同様であるため、ここでは、同じ符号を付して説明を省略する。
　－吐出冷媒連絡管－
　吐出冷媒連絡管１２は、吐出側閉鎖弁３１を介して熱源側吐出分岐管２１ｄに接続されており、熱源側切換機構２３が熱源側放熱運転状態及び熱源側蒸発運転状態のいずれにおいても熱源側圧縮機２１の吐出から熱源ユニット２外に熱源側冷媒を導出することが可能な冷媒管である。 Here, the discharge side shut-off valve 31 is formed between the heat source side discharge branch pipe 21d branched from the heat source side discharge pipe 21b connecting the discharge of the heat source side compressor 21 and the heat source side switching mechanism 23 and the gas refrigerant communication pipe 14. It is the valve provided in the connection part.
The heat source unit 2 is the same as the heat pump system 1 (see FIG. 1) in the first embodiment except for the configuration except that the heat source unit 2 has the discharge side shut-off valve 31 and the heat source side discharge branch pipe 21d. The same reference numerals are given and the description is omitted.
-Discharge refrigerant communication tube-
The discharge refrigerant communication pipe 12 is connected to the heat source side discharge branch pipe 21d via the discharge side closing valve 31, and the heat source side switching mechanism 23 is on the heat source side in both the heat source side heat radiation operation state and the heat source side evaporation operation state. This is a refrigerant pipe capable of leading the heat source side refrigerant out of the heat source unit 2 from the discharge of the compressor 21.
　－第１利用ユニット－
　第１利用ユニット４ａは、屋内に設置されており、冷媒連絡管１２、１３を介して熱源ユニット２及び第２利用ユニット１０ａに接続されており、熱源側冷媒回路２０の一部を構成している。また、第１利用ユニット４ａは、水媒体連絡管１５ａ、１６ａを介して貯湯ユニット８ａ及び温水暖房ユニット９ａに接続されており、水媒体回路８０ａの一部を構成している。
　第１利用ユニット４ａは、主として、第１利用側熱交換器４１ａと、第１利用側流量調節弁４２ａと、循環ポンプ４３ａとを有している。
　ここで、第１利用側熱交換器４１ａには、その熱源側冷媒が流れる流路のガス側に、第１実施形態におけるヒートポンプシステム１（図１参照）のようなガス冷媒連絡管１４に接続された第１利用側ガス冷媒管５４ａに代えて、吐出冷媒連絡管１２が接続された第１利用側吐出冷媒管４６ａが接続されている。第１利用側吐出冷媒管４６ａには、吐出冷媒連絡管１２から第１利用側熱交換器４１ａへ向かう熱源側冷媒の流れを許容し、第１利用側熱交換器４１ａから吐出冷媒連絡管１２へ向かう熱源側冷媒の流れを禁止する第１利用側吐出逆止弁４９ａが設けられている。 -First use unit-
The first usage unit 4a is installed indoors, is connected to the heat source unit 2 and the second usage unit 10a via the refrigerant communication pipes 12 and 13, and constitutes a part of the heat source side refrigerant circuit 20. Yes. Moreover, the 1st utilization unit 4a is connected to the hot water storage unit 8a and the hot water heating unit 9a via the aqueous medium communication pipes 15a and 16a, and comprises a part of aqueous medium circuit 80a.
The first usage unit 4a mainly includes a first usage-side heat exchanger 41a, a first usage-side flow rate adjustment valve 42a, and a circulation pump 43a.
Here, the first use side heat exchanger 41a is connected to the gas refrigerant communication tube 14 like the heat pump system 1 (see FIG. 1) in the first embodiment on the gas side of the flow path through which the heat source side refrigerant flows. Instead of the first use side gas refrigerant pipe 54a, a first use side discharge refrigerant pipe 46a to which the discharge refrigerant communication pipe 12 is connected is connected. The first use side discharge refrigerant pipe 46a allows the flow of the heat source side refrigerant from the discharge refrigerant communication pipe 12 toward the first use side heat exchanger 41a, and is discharged from the first use side heat exchanger 41a to the discharge refrigerant communication pipe 12. A first usage-side discharge check valve 49a that prohibits the flow of the heat source side refrigerant toward the first side is provided.
　尚、利用ユニット４ａは、第１利用側ガス冷媒管５４ａに代えて、第１利用側吐出冷媒管４６ａが接続されている点を除いた構成については、第１実施形態におけるヒートポンプシステム１（図１参照）と同様であるため、ここでは、同じ符号を付して説明を省略する。
　また、ヒートポンプシステム３００には、第１及び第２利用側コントローラの設定や指令によって、以下の運転や各種制御を行う制御部（図示せず）が設けられている。
　＜動作＞
　次に、ヒートポンプシステム３００の動作について説明する。
　ヒートポンプシステム３００の運転としては、第１利用ユニット４ａの給湯運転（すなわち、貯湯ユニット８ａ及び／又は温水暖房ユニット９ａの運転）のみを行う給湯運転と、第２利用ユニット１０ａ及び／又は第２利用ユニット１０ｂの冷房運転のみを行う冷房運転と、第２利用ユニット１０ａ及び／又は第２利用ユニット１０ｂの暖房運転のみを行う暖房運転と、第１利用ユニット４ａの給湯運転を行うとともに第２利用ユニット１０ａ及び／又は第２利用ユニット１０ｂの暖房運転を行う給湯暖房運転と、第１利用ユニット４ａの給湯運転を行うとともに第２利用ユニット１０ａ及び／又は第２利用ユニット１０ｂの冷房運転を行う排熱給湯運転とがある。 The usage unit 4a has a configuration excluding the point where the first usage-side discharge refrigerant pipe 46a is connected instead of the first usage-side gas refrigerant pipe 54a. 1), the same reference numerals are given here, and description thereof is omitted.
Further, the heat pump system 300 is provided with a control unit (not shown) that performs the following operations and various controls according to the settings and commands of the first and second usage-side controllers.
<Operation>
Next, the operation of the heat pump system 300 will be described.
The operation of the heat pump system 300 includes a hot water supply operation in which only the hot water supply operation of the first usage unit 4a (that is, the operation of the hot water storage unit 8a and / or the hot water heating unit 9a), the second usage unit 10a and / or the second usage. A cooling operation that performs only the cooling operation of the unit 10b, a heating operation that performs only the heating operation of the second usage unit 10a and / or the second usage unit 10b, and a hot water supply operation of the first usage unit 4a and the second usage unit Hot water supply and heating operation for performing heating operation of 10a and / or the second usage unit 10b, and exhaust heat for performing cooling operation of the second usage unit 10a and / or the second usage unit 10b while performing the hot water supply operation of the first usage unit 4a There is hot water operation.
　以下、ヒートポンプシステム３００の５つの運転における動作について説明する。
　－給湯運転－
　第１利用ユニット４ａの給湯運転のみを行う場合には、熱源側冷媒回路２０においては、熱源側切換機構２３が熱源側蒸発運転状態（図４の熱源側切換機構２３の破線で示された状態）に切り換えられ、吸入戻し膨張弁２６ａ及び第２利用側流量調節弁１０２ａ、１０２ｂが閉止された状態になる。また、水媒体回路８０ａにおいては、水媒体切換機構１６１ａが貯湯ユニット８ａ及び／又は温水暖房ユニット９ａに水媒体を供給する状態に切り換えられる。ここでは、第２利用側コントローラ１０８ａ、１０８ｂのうちの１つによって、温調モードとしての熱源側切換機構２３の切換状態を熱源側蒸発運転状態に切り換えた上で、第１利用側コントローラ７７ａの運転指令によって、第１利用ユニット４ａ（及び、貯湯ユニット８ａ及び／又は温水暖房ユニット９ａ）の運転（給湯運転）が行われる。 Hereinafter, operations in five operations of the heat pump system 300 will be described.
-Hot water operation-
When only the hot water supply operation of the first usage unit 4a is performed, in the heat source side refrigerant circuit 20, the heat source side switching mechanism 23 is in the heat source side evaporation operation state (the state indicated by the broken line of the heat source side switching mechanism 23 in FIG. 4). ), And the suction return expansion valve 26a and the second usage side flow rate adjustment valves 102a, 102b are closed. In the aqueous medium circuit 80a, the aqueous medium switching mechanism 161a is switched to a state in which the aqueous medium is supplied to the hot water storage unit 8a and / or the hot water heating unit 9a. Here, the switching state of the heat source side switching mechanism 23 as the temperature control mode is switched to the heat source side evaporation operation state by one of the second usage side controllers 108a and 108b, and then the first usage side controller 77a. The operation (hot water supply operation) of the first usage unit 4a (and the hot water storage unit 8a and / or the hot water heating unit 9a) is performed according to the operation command.
　このような状態の熱源側冷媒回路２０において、冷凍サイクルにおける低圧の熱源側冷媒は、熱源側吸入管２１ｃを通じて、熱源側圧縮機２１に吸入され、冷凍サイクルにおける高圧まで圧縮された後に、熱源側吐出管２１ｂに吐出される。熱源側吐出管２１ｂに吐出された高圧の熱源側冷媒は、油分離器２２ａにおいて冷凍機油が分離される。油分離器２２ａにおいて熱源側冷媒から分離された冷凍機油は、油戻し管２２ｂを通じて、熱源側吸入管２１ｃに戻される。冷凍機油が分離された高圧の熱源側冷媒は、熱源側吐出分岐管２１ｄ及び吐出側閉鎖弁３１を通じて、熱源ユニット２から吐出冷媒連絡管１２に送られる。
　吐出冷媒連絡管１２に送られた高圧の熱源側冷媒は、第１利用ユニット４ａに送られる。第１利用ユニット４ａに送られた高圧の熱源側冷媒は、第１利用側吐出冷媒管４６ａ及び第１利用側吐出逆止弁４９ａを通じて、第１利用側熱交換器４１ａに送られる。第１利用側熱交換器４１ａに送られた高圧の熱源側冷媒は、第１利用側熱交換器４１ａにおいて、循環ポンプ４３ａによって水媒体回路８０ａを循環する水媒体と熱交換を行って放熱する。第１利用側熱交換器４１ａにおいて放熱した高圧の熱源側冷媒は、第１利用側流量調節弁４２ａ及び第１利用側液冷媒管４５ａを通じて、第１利用ユニット４ａから液冷媒連絡管１３に送られる。 In the heat source side refrigerant circuit 20 in such a state, the low pressure heat source side refrigerant in the refrigeration cycle is sucked into the heat source side compressor 21 through the heat source side suction pipe 21c and compressed to a high pressure in the refrigeration cycle, and then the heat source side refrigerant circuit 20 is cooled. It is discharged to the discharge pipe 21b. The high pressure heat source side refrigerant discharged to the heat source side discharge pipe 21b is separated from the refrigerating machine oil in the oil separator 22a. The refrigerating machine oil separated from the heat source side refrigerant in the oil separator 22a is returned to the heat source side suction pipe 21c through the oil return pipe 22b. The high-pressure heat-source-side refrigerant from which the refrigeration oil has been separated is sent from the heat-source unit 2 to the discharge refrigerant communication tube 12 through the heat-source-side discharge branch pipe 21d and the discharge-side shut-off valve 31.
The high-pressure heat source side refrigerant sent to the discharge refrigerant communication tube 12 is sent to the first usage unit 4a. The high-pressure heat-source-side refrigerant sent to the first usage unit 4a is sent to the first usage-side heat exchanger 41a through the first usage-side discharge refrigerant tube 46a and the first usage-side discharge check valve 49a. The high-pressure heat-source-side refrigerant sent to the first usage-side heat exchanger 41a radiates heat by exchanging heat with the aqueous medium circulating in the aqueous-medium circuit 80a by the circulation pump 43a in the first usage-side heat exchanger 41a. . The high-pressure heat-source-side refrigerant radiated in the first usage-side heat exchanger 41a is sent from the first usage unit 4a to the liquid refrigerant communication tube 13 through the first usage-side flow rate adjustment valve 42a and the first usage-side liquid refrigerant tube 45a. It is done.
　液冷媒連絡管１３に送られた熱源側冷媒は、熱源ユニット２に送られる。熱源ユニット２に送られた熱源側冷媒は、液側閉鎖弁２９を通じて、過冷却器２７に送られる。過冷却器２７に送られた熱源側冷媒は、吸入戻し管２６に熱源側冷媒が流れていないため、熱交換を行うことなく、熱源側膨張弁２５に送られる。熱源側膨張弁２５に送られた熱源側冷媒は、熱源側膨張弁２５において減圧されて、低圧の気液二相状態になり、熱源側液冷媒管２４ａを通じて、熱源側熱交換器２４に送られる。熱源側熱交換器２４に送られた低圧の冷媒は、熱源側熱交換器２４において、熱源側ファン３２によって供給される室外空気と熱交換を行って蒸発する。熱源側熱交換器２４において蒸発した低圧の熱源側冷媒は、第１熱源側ガス冷媒管２３ａ及び熱源側切換機構２３を通じて、熱源側アキュムレータ２８に送られる。熱源側アキュムレータ２８に送られた低圧の熱源側冷媒は、熱源側吸入管２１ｃを通じて、再び、熱源側圧縮機２１に吸入される。 The heat source side refrigerant sent to the liquid refrigerant communication tube 13 is sent to the heat source unit 2. The heat source side refrigerant sent to the heat source unit 2 is sent to the supercooler 27 through the liquid side shut-off valve 29. The heat source side refrigerant sent to the subcooler 27 is sent to the heat source side expansion valve 25 without performing heat exchange because the heat source side refrigerant does not flow through the suction return pipe 26. The heat source side refrigerant sent to the heat source side expansion valve 25 is depressurized by the heat source side expansion valve 25 to be in a low-pressure gas-liquid two-phase state, and sent to the heat source side heat exchanger 24 through the heat source side liquid refrigerant tube 24a. It is done. The low-pressure refrigerant sent to the heat source side heat exchanger 24 evaporates by exchanging heat with outdoor air supplied by the heat source side fan 32 in the heat source side heat exchanger 24. The low-pressure heat source side refrigerant evaporated in the heat source side heat exchanger 24 is sent to the heat source side accumulator 28 through the first heat source side gas refrigerant tube 23a and the heat source side switching mechanism 23. The low-pressure heat source side refrigerant sent to the heat source side accumulator 28 is again sucked into the heat source side compressor 21 through the heat source side suction pipe 21c.
　一方、水媒体回路８０ａにおいては、第１利用側熱交換器４１ａにおける熱源側冷媒の放熱によって水媒体回路８０ａを循環する水媒体が加熱される。第１利用側熱交換器４１ａにおいて加熱された水媒体は、第１利用側水出口管４８ａを通じて、循環ポンプ４３ａに吸入され、昇圧された後に、第１利用ユニット４ａから水媒体連絡管１６ａに送られる。水媒体連絡管１６ａに送られた水媒体は、水媒体側切換機構１６１ａを通じて、貯湯ユニット８ａ及び／又は温水暖房ユニット９ａに送られる。貯湯ユニット８ａに送られた水媒体は、熱交換コイル８２ａにおいて貯湯タンク８１ａ内の水媒体と熱交換を行って放熱し、これにより、貯湯タンク８１ａ内の水媒体を加熱する。温水暖房ユニット９ａに送られた水媒体は、熱交換パネル９１ａにおいて放熱し、これにより、室内の壁際等を加熱したり室内の床を加熱する。 On the other hand, in the aqueous medium circuit 80a, the aqueous medium circulating in the aqueous medium circuit 80a is heated by the heat radiation of the heat source side refrigerant in the first usage-side heat exchanger 41a. The aqueous medium heated in the first usage-side heat exchanger 41a is sucked into the circulation pump 43a through the first usage-side water outlet pipe 48a, and after the pressure is increased, from the first usage unit 4a to the aqueous medium communication pipe 16a. Sent. The aqueous medium sent to the aqueous medium communication pipe 16a is sent to the hot water storage unit 8a and / or the hot water heating unit 9a through the aqueous medium side switching mechanism 161a. The aqueous medium sent to the hot water storage unit 8a exchanges heat with the aqueous medium in the hot water storage tank 81a in the heat exchange coil 82a to radiate heat, thereby heating the aqueous medium in the hot water storage tank 81a. The aqueous medium sent to the hot water heating unit 9a dissipates heat in the heat exchange panel 91a, thereby heating the indoor wall or the like or heating the indoor floor.
　このようにして、第１利用ユニット４ａの給湯運転のみを行う給湯運転における動作が行われる。
　－冷房運転－
　第２利用ユニット１０ａ及び／又は第２利用ユニット１０ｂの冷房運転のみを行う場合には、熱源側冷媒回路２０においては、熱源側切換機構２３が熱源側放熱運転状態（図４の熱源側切換機構２３の実線で示された状態）に切り換えられ、第１利用側流量調節弁４２ａが閉止された状態になる。ここでは、第２利用側コントローラ１０８ａ、１０８ｂのうちの１つによって、温調モードとしての熱源側切換機構２３の切換状態を熱源側放熱運転状態に切り換えた上で、第２利用側コントローラ１０８ａ及び／又は第２利用側コントローラ１０８ｂの運転指令によって、第２利用ユニット１０ａ及び／又は第２利用ユニット１０ｂの運転（冷房運転）が行われる。尚、冷房運転については、第１実施形態のヒートポンプシステム１における冷房運転と同様であるため、ここでは説明を省略する。 Thus, the operation | movement in the hot water supply operation which performs only the hot water supply operation of the 1st utilization unit 4a is performed.
-Cooling operation-
When only the cooling operation of the second usage unit 10a and / or the second usage unit 10b is performed, in the heat source side refrigerant circuit 20, the heat source side switching mechanism 23 is in the heat source side heat radiation operation state (the heat source side switching mechanism in FIG. 4). 23, the first use side flow rate adjustment valve 42a is closed. Here, after switching the switching state of the heat source side switching mechanism 23 as the temperature control mode to the heat source side heat radiation operation state by one of the second usage side controllers 108a and 108b, the second usage side controller 108a and The operation (cooling operation) of the second usage unit 10a and / or the second usage unit 10b is performed according to the operation command of the second usage side controller 108b. Since the cooling operation is the same as the cooling operation in the heat pump system 1 of the first embodiment, the description thereof is omitted here.
　－暖房運転－
　第２利用ユニット１０ａ及び／又は第２利用ユニット１０ｂの暖房運転のみを行う場合には、熱源側冷媒回路２０においては、熱源側切換機構２３が熱源側放熱運転状態（図４の熱源側切換機構２３の破線で示された状態）に切り換えられ、吸入戻し膨張弁２６ａ及び第１利用側流量調節弁４２ａが閉止された状態になる。ここでは、第２利用側コントローラ１０８ａ、１０８ｂのうちの１つによって、温調モードとしての熱源側切換機構２３の切換状態を熱源側蒸発運転状態に切り換えた上で、第２利用側コントローラ１０８ａ及び／又は第２利用側コントローラ１０８ｂの運転指令によって、第２利用ユニット１０ａ及び／又は第２利用ユニット１０ｂの運転（暖房運転）が行われる。尚、暖房運転については、第１実施形態のヒートポンプシステム１における暖房運転と同様であるため、ここでは説明を省略する。 -Heating operation-
When only the heating operation of the second usage unit 10a and / or the second usage unit 10b is performed, in the heat source side refrigerant circuit 20, the heat source side switching mechanism 23 is in the heat source side heat radiation operation state (the heat source side switching mechanism in FIG. 4). 23, the suction return expansion valve 26a and the first usage-side flow rate adjustment valve 42a are closed. Here, after switching the switching state of the heat source side switching mechanism 23 as the temperature control mode to the heat source side evaporation operation state by one of the second usage side controllers 108a and 108b, the second usage side controller 108a and The operation (heating operation) of the second usage unit 10a and / or the second usage unit 10b is performed according to the operation command of the second usage side controller 108b. Since the heating operation is the same as the heating operation in the heat pump system 1 of the first embodiment, the description thereof is omitted here.
　－給湯暖房運転－
　第１利用ユニット４ａの給湯運転を行うとともに第２利用ユニット１０ａ及び／又は第２利用ユニット１０ｂの暖房運転を行う場合には、熱源側冷媒回路２０においては、熱源側切換機構２３が熱源側蒸発運転状態（図４の熱源側切換機構２３の破線で示された状態）に切り換えられ、吸入戻し膨張弁２６ａが閉止された状態になる。また、水媒体回路８０ａにおいては、水媒体切換機構１６１ａが貯湯ユニット８ａ及び／又は温水暖房ユニット９ａに水媒体を供給する状態に切り換えられる。ここでは、第２利用側コントローラ１０８ａ、１０８ｂのうちの１つによって、温調モードとしての熱源側切換機構２３の切換状態を熱源側蒸発運転状態に切り換えた上で、第１利用側コントローラ７７ａの運転指令によって、第１利用ユニット４ａ（及び、貯湯ユニット８ａ及び／又は温水暖房ユニット９ａ）の運転（給湯運転）と、第２利用側コントローラ１０８ａ及び／又は第２利用側コントローラ１０８ｂの運転指令によって、第２利用ユニット１０ａ及び／又は第２利用ユニット１０ｂの運転（暖房運転）が行われる。 -Hot water heater operation-
When the hot water supply operation of the first usage unit 4a and the heating operation of the second usage unit 10a and / or the second usage unit 10b are performed, in the heat source side refrigerant circuit 20, the heat source side switching mechanism 23 is heat source side evaporation. The operation state is switched to the operation state (the state indicated by the broken line of the heat source side switching mechanism 23 in FIG. 4), and the suction return expansion valve 26a is closed. In the aqueous medium circuit 80a, the aqueous medium switching mechanism 161a is switched to a state in which the aqueous medium is supplied to the hot water storage unit 8a and / or the hot water heating unit 9a. Here, the switching state of the heat source side switching mechanism 23 as the temperature control mode is switched to the heat source side evaporation operation state by one of the second usage side controllers 108a and 108b, and then the first usage side controller 77a. According to the operation command, the operation (hot water supply operation) of the first usage unit 4a (and the hot water storage unit 8a and / or the hot water heating unit 9a) and the operation command of the second usage side controller 108a and / or the second usage side controller 108b The operation (heating operation) of the second usage unit 10a and / or the second usage unit 10b is performed.
　このような状態の熱源側冷媒回路２０において、冷凍サイクルにおける低圧の熱源側冷媒は、熱源側吸入管２１ｃを通じて、熱源側圧縮機２１に吸入され、冷凍サイクルにおける高圧まで圧縮された後に、熱源側吐出管２１ｂに吐出される。熱源側吐出管２１ｂに吐出された高圧の熱源側冷媒は、油分離器２２ａにおいて冷凍機油が分離される。油分離器２２ａにおいて熱源側冷媒から分離された冷凍機油は、油戻し管２２ｂを通じて、熱源側吸入管２１ｃに戻される。冷凍機油が分離された高圧の熱源側冷媒は、その一部が、熱源側吐出分岐管２１ｄ及び吐出側閉鎖弁３１を通じて、熱源ユニット２から吐出冷媒連絡管１２に送られ、その残りが、熱源側切換機構２３、第２熱源側ガス冷媒管２３ｂ及びガス側閉鎖弁３０を通じて、熱源ユニット２からガス冷媒連絡管１４に送られる。
　ガス冷媒連絡管１４に送られた高圧の熱源側冷媒は、第２利用ユニット１０ａ、１０ｂ（ここでは、第２利用ユニット１０ａ、１０ｂの両方を暖房運転するものとして説明する）に送られる。第２利用ユニット１０ａ、１０ｂに送られた高圧の熱源側冷媒は、第２利用側ガス冷媒管１０４ａ、１０４ｂを通じて、第２利用側熱交換器１０１ａ、１０１ｂに送られる。第２利用側熱交換器１０１ａ、１０１ｂに送られた高圧の熱源側冷媒は、第２利用側熱交換器１０１ａ、１０１ｂにおいて、利用側ファン１０５ａ、１０５ｂによって供給される空気媒体と熱交換を行って放熱し、これにより、室内の暖房を行う。第２利用側熱交換器１０１ａ、１０１ｂにおいて放熱した高圧の熱源側冷媒は、第２利用側流量調節弁１０２ａ、１０２ｂ及び第２利用側液冷媒管１０３ａ、１０３ｂを通じて、第２利用ユニット１０ａ、１０ｂから液冷媒連絡管１３に送られる。 In the heat source side refrigerant circuit 20 in such a state, the low pressure heat source side refrigerant in the refrigeration cycle is sucked into the heat source side compressor 21 through the heat source side suction pipe 21c and compressed to a high pressure in the refrigeration cycle, and then the heat source side refrigerant circuit 20 is cooled. It is discharged to the discharge pipe 21b. The high pressure heat source side refrigerant discharged to the heat source side discharge pipe 21b is separated from the refrigerating machine oil in the oil separator 22a. The refrigerating machine oil separated from the heat source side refrigerant in the oil separator 22a is returned to the heat source side suction pipe 21c through the oil return pipe 22b. A part of the high-pressure heat source side refrigerant from which the refrigerating machine oil has been separated is sent from the heat source unit 2 to the discharge refrigerant communication pipe 12 through the heat source side discharge branch pipe 21d and the discharge side shut-off valve 31, and the rest is used as the heat source. It is sent from the heat source unit 2 to the gas refrigerant communication pipe 14 through the side switching mechanism 23, the second heat source side gas refrigerant pipe 23 b, and the gas side closing valve 30.
The high-pressure heat-source-side refrigerant sent to the gas refrigerant communication tube 14 is sent to the second usage units 10a and 10b (here, it is assumed that both the second usage units 10a and 10b are operated for heating). The high-pressure heat-source-side refrigerant sent to the second usage units 10a, 10b is sent to the second usage- side heat exchangers 101a, 101b through the second usage-side gas refrigerant tubes 104a, 104b. The high-pressure heat-source-side refrigerant sent to the second usage- side heat exchangers 101a and 101b exchanges heat with the air medium supplied by the usage- side fans 105a and 105b in the second usage- side heat exchangers 101a and 101b. To dissipate heat, thereby heating the room. The high-pressure heat-source-side refrigerant radiated in the second usage- side heat exchangers 101a and 101b passes through the second usage-side flow rate adjustment valves 102a and 102b and the second usage-side liquid refrigerant tubes 103a and 103b, and the second usage units 10a and 10b. To the liquid refrigerant communication tube 13.
　吐出冷媒連絡管１２に送られた高圧の熱源側冷媒は、第１利用ユニット４ａに送られる。第１利用ユニット４ａに送られた高圧の熱源側冷媒は、第１利用側吐出冷媒管４６ａ及び第１利用側吐出逆止弁４９ａを通じて、第１利用側熱交換器４１ａに送られる。第１利用側熱交換器４１ａに送られた高圧の熱源側冷媒は、第１利用側熱交換器４１ａにおいて、循環ポンプ４３ａによって水媒体回路８０ａを循環する水媒体と熱交換を行って放熱する。第１利用側熱交換器４１ａにおいて放熱した高圧の熱源側冷媒は、第１利用側流量調節弁４２ａ及び第１利用側液冷媒管４５ａを通じて、第１利用ユニット４ａから液冷媒連絡管１３に送られる。
　第２利用ユニット１０ａ、１０ｂ及び第１利用ユニット４ａから液冷媒連絡管１３に送られた熱源側冷媒は、液冷媒連絡管１３において合流して、熱源ユニット２に送られる。熱源ユニット２に送られた熱源側冷媒は、液側閉鎖弁２９を通じて、過冷却器２７に送られる。過冷却器２７に送られた熱源側冷媒は、吸入戻し管２６に熱源側冷媒が流れていないため、熱交換を行うことなく、熱源側膨張弁２５に送られる。熱源側膨張弁２５に送られた熱源側冷媒は、熱源側膨張弁２５において減圧されて、低圧の気液二相状態になり、熱源側液冷媒管２４ａを通じて、熱源側熱交換器２４に送られる。熱源側熱交換器２４に送られた低圧の冷媒は、熱源側熱交換器２４において、熱源側ファン３２によって供給される室外空気と熱交換を行って蒸発する。熱源側熱交換器２４において蒸発した低圧の熱源側冷媒は、第１熱源側ガス冷媒管２３ａ及び熱源側切換機構２３を通じて、熱源側アキュムレータ２８に送られる。熱源側アキュムレータ２８に送られた低圧の熱源側冷媒は、熱源側吸入管２１ｃを通じて、再び、熱源側圧縮機２１に吸入される。 The high-pressure heat source side refrigerant sent to the discharge refrigerant communication tube 12 is sent to the first usage unit 4a. The high-pressure heat-source-side refrigerant sent to the first usage unit 4a is sent to the first usage-side heat exchanger 41a through the first usage-side discharge refrigerant tube 46a and the first usage-side discharge check valve 49a. The high-pressure heat-source-side refrigerant sent to the first usage-side heat exchanger 41a radiates heat by exchanging heat with the aqueous medium circulating in the aqueous-medium circuit 80a by the circulation pump 43a in the first usage-side heat exchanger 41a. . The high-pressure heat-source-side refrigerant radiated in the first usage-side heat exchanger 41a is sent from the first usage unit 4a to the liquid refrigerant communication tube 13 through the first usage-side flow rate adjustment valve 42a and the first usage-side liquid refrigerant tube 45a. It is done.
The heat source side refrigerant sent from the second usage units 10a and 10b and the first usage unit 4a to the liquid refrigerant communication tube 13 merges in the liquid refrigerant communication tube 13 and is sent to the heat source unit 2. The heat source side refrigerant sent to the heat source unit 2 is sent to the supercooler 27 through the liquid side closing valve 29. The heat source side refrigerant sent to the subcooler 27 is sent to the heat source side expansion valve 25 without performing heat exchange because the heat source side refrigerant does not flow through the suction return pipe 26. The heat source side refrigerant sent to the heat source side expansion valve 25 is depressurized by the heat source side expansion valve 25 to be in a low-pressure gas-liquid two-phase state, and sent to the heat source side heat exchanger 24 through the heat source side liquid refrigerant tube 24a. It is done. The low-pressure refrigerant sent to the heat source side heat exchanger 24 evaporates by exchanging heat with outdoor air supplied by the heat source side fan 32 in the heat source side heat exchanger 24. The low-pressure heat source side refrigerant evaporated in the heat source side heat exchanger 24 is sent to the heat source side accumulator 28 through the first heat source side gas refrigerant tube 23a and the heat source side switching mechanism 23. The low-pressure heat source side refrigerant sent to the heat source side accumulator 28 is again sucked into the heat source side compressor 21 through the heat source side suction pipe 21c.
　一方、水媒体回路８０ａにおいては、第１利用側熱交換器４１ａにおける熱源側冷媒の放熱によって水媒体回路８０ａを循環する水媒体が加熱される。第１利用側熱交換器４１ａにおいて加熱された水媒体は、第１利用側水出口管４８ａを通じて、循環ポンプ４３ａに吸入され、昇圧された後に、第１利用ユニット４ａから水媒体連絡管１６ａに送られる。水媒体連絡管１６ａに送られた水媒体は、水媒体側切換機構１６１ａを通じて、貯湯ユニット８ａ及び／又は温水暖房ユニット９ａに送られる。貯湯ユニット８ａに送られた水媒体は、熱交換コイル８２ａにおいて貯湯タンク８１ａ内の水媒体と熱交換を行って放熱し、これにより、貯湯タンク８１ａ内の水媒体を加熱する。温水暖房ユニット９ａに送られた水媒体は、熱交換パネル９１ａにおいて放熱し、これにより、室内の壁際等を加熱したり室内の床を加熱する。 On the other hand, in the aqueous medium circuit 80a, the aqueous medium circulating in the aqueous medium circuit 80a is heated by the heat radiation of the heat source side refrigerant in the first usage-side heat exchanger 41a. The aqueous medium heated in the first usage-side heat exchanger 41a is sucked into the circulation pump 43a through the first usage-side water outlet pipe 48a, and after the pressure is increased, from the first usage unit 4a to the aqueous medium communication pipe 16a. Sent. The aqueous medium sent to the aqueous medium communication pipe 16a is sent to the hot water storage unit 8a and / or the hot water heating unit 9a through the aqueous medium side switching mechanism 161a. The aqueous medium sent to the hot water storage unit 8a exchanges heat with the aqueous medium in the hot water storage tank 81a in the heat exchange coil 82a to radiate heat, thereby heating the aqueous medium in the hot water storage tank 81a. The aqueous medium sent to the hot water heating unit 9a dissipates heat in the heat exchange panel 91a, thereby heating the indoor wall or the like or heating the indoor floor.
　このようにして、第１利用ユニット４ａの給湯運転を行うとともに第２利用ユニット１０ａ及び／又は第２利用ユニット１０ｂの暖房運転を行う給湯暖房運転における動作が行われる。
　－排熱給湯運転－
　第１利用ユニット４ａの給湯運転を行うとともに第２利用ユニット１０ａ及び／又は第２利用ユニット１０ｂの冷房運転を行う排熱給湯運転を行う場合には、熱源側冷媒回路２０においては、熱源側切換機構２３が熱源側放熱運転状態（図４の熱源側切換機構２３の実線で示された状態）に切り換えられた状態になる。また、水媒体回路８０ａにおいては、水媒体切換機構１６１ａが貯湯ユニット８ａに水媒体を供給する状態に切り換えられる。ここでは、第２利用側コントローラ１０８ａ、１０８ｂのうちの１つによって、温調モードとしての熱源側切換機構２３の切換状態を熱源側蒸発運転状態に切り換えた上で、第１利用側コントローラ７７ａの運転指令によって、第１利用ユニット４ａ（及び、貯湯ユニット８ａ及び／又は温水暖房ユニット９ａ）の運転（給湯運転）と、第２利用側コントローラ１０８ａ及び／又は第２利用側コントローラ１０８ｂの運転指令によって、第２利用ユニット１０ａ及び／又は第２利用ユニット１０ｂの運転（冷房運転）が行われる。 In this way, the hot water supply operation of the first usage unit 4a and the heating operation of the second usage unit 10a and / or the second usage unit 10b are performed.
-Waste heat hot water operation-
In the case of performing the exhaust heat hot water supply operation for performing the hot water supply operation of the first usage unit 4a and the cooling operation of the second usage unit 10a and / or the second usage unit 10b, the heat source side refrigerant circuit 20 performs heat source side switching. The mechanism 23 is switched to the heat source side heat radiation operation state (the state indicated by the solid line of the heat source side switching mechanism 23 in FIG. 4). In the aqueous medium circuit 80a, the aqueous medium switching mechanism 161a is switched to a state of supplying the aqueous medium to the hot water storage unit 8a. Here, the switching state of the heat source side switching mechanism 23 as the temperature control mode is switched to the heat source side evaporation operation state by one of the second usage side controllers 108a and 108b, and then the first usage side controller 77a. According to the operation command, the operation (hot water supply operation) of the first usage unit 4a (and the hot water storage unit 8a and / or the hot water heating unit 9a) and the operation command of the second usage side controller 108a and / or the second usage side controller 108b The second usage unit 10a and / or the second usage unit 10b is operated (cooling operation).
　このような状態の熱源側冷媒回路２０において、冷凍サイクルにおける低圧の熱源側冷媒は、熱源側吸入管２１ｃを通じて、熱源側圧縮機２１に吸入され、冷凍サイクルにおける高圧まで圧縮された後に、熱源側吐出管２１ｂに吐出される。熱源側吐出管２１ｂに吐出された高圧の熱源側冷媒は、油分離器２２ａにおいて冷凍機油が分離される。油分離器２２ａにおいて熱源側冷媒から分離された冷凍機油は、油戻し管２２ｂを通じて、熱源側吸入管２１ｃに戻される。冷凍機油が分離された高圧の熱源側冷媒は、その一部が、熱源側吐出分岐管２１ｄ及び吐出側閉鎖弁３１を通じて、熱源ユニット２から吐出冷媒連絡管１２に送られ、その残りが、熱源側切換機構２３及び第１熱源側ガス冷媒管２３ａを通じて、熱源側熱交換器２４に送られる。熱源側熱交換器２４に送られた高圧の熱源側冷媒は、熱源側熱交換器２４において、熱源側ファン３２によって供給される室外空気と熱交換を行って放熱する。熱源側熱交換器において放熱した高圧の熱源側冷媒は、熱源側膨張弁２５を通じて、過冷却器２７に送られる。過冷却器２７に送られた熱源側冷媒は、熱源側液冷媒管２４ａから吸入戻し管２６に分岐された熱源側冷媒と熱交換を行って過冷却状態になるように冷却される。吸入戻し管２６を流れる熱源側冷媒は、熱源側吸入管２１ｃに戻される。過冷却器２７において冷却された熱源側冷媒は、熱源側液冷媒管２４ａ及び液側閉鎖弁２９を通じて、熱源ユニット２から液冷媒連絡管１３に送られる。 In the heat source side refrigerant circuit 20 in such a state, the low pressure heat source side refrigerant in the refrigeration cycle is sucked into the heat source side compressor 21 through the heat source side suction pipe 21c and compressed to a high pressure in the refrigeration cycle, and then the heat source side refrigerant circuit 20 is cooled. It is discharged to the discharge pipe 21b. The high pressure heat source side refrigerant discharged to the heat source side discharge pipe 21b is separated from the refrigerating machine oil in the oil separator 22a. The refrigerating machine oil separated from the heat source side refrigerant in the oil separator 22a is returned to the heat source side suction pipe 21c through the oil return pipe 22b. A part of the high-pressure heat source side refrigerant from which the refrigerating machine oil is separated is sent from the heat source unit 2 to the discharge refrigerant communication pipe 12 through the heat source side discharge branch pipe 21d and the discharge side shut-off valve 31, and the rest is used as the heat source. It is sent to the heat source side heat exchanger 24 through the side switching mechanism 23 and the first heat source side gas refrigerant tube 23a. The high-pressure heat-source-side refrigerant sent to the heat-source-side heat exchanger 24 radiates heat by exchanging heat with outdoor air supplied by the heat-source-side fan 32 in the heat source-side heat exchanger 24. The high-pressure heat-source-side refrigerant that has radiated heat in the heat-source-side heat exchanger is sent to the supercooler 27 through the heat source-side expansion valve 25. The heat-source-side refrigerant sent to the subcooler 27 is cooled so as to be in a supercooled state by exchanging heat with the heat-source-side refrigerant branched from the heat source-side liquid refrigerant tube 24a to the suction return tube 26. The heat source side refrigerant flowing through the suction return pipe 26 is returned to the heat source side suction pipe 21c. The heat source side refrigerant cooled in the subcooler 27 is sent from the heat source unit 2 to the liquid refrigerant communication tube 13 through the heat source side liquid refrigerant tube 24a and the liquid side shut-off valve 29.
　吐出冷媒連絡管１２に送られた高圧の熱源側冷媒は、第１利用ユニット４ａに送られる。第１利用ユニット４ａに送られた高圧の熱源側冷媒は、第１利用側吐出冷媒管４６ａ及び第１利用側吐出逆止弁４９ａを通じて、第１利用側熱交換器４１ａに送られる。第１利用側熱交換器４１ａに送られた高圧の熱源側冷媒は、第１利用側熱交換器４１ａにおいて、循環ポンプ４３ａによって水媒体回路８０ａを循環する水媒体と熱交換を行って放熱する。第１利用側熱交換器４１ａにおいて放熱した高圧の熱源側冷媒は、第１利用側流量調節弁４２ａ及び第１利用側液冷媒管４５ａを通じて、第１利用ユニット４ａから液冷媒連絡管１３に送られる。
　熱源ユニット２及び第１利用ユニット４ａから液冷媒連絡管１３に送られた熱源側冷媒は、液冷媒連絡管１３において合流して、第２利用ユニット１０ａ、１０ｂ（ここでは、第２利用ユニット１０ａ、１０ｂの両方を暖房運転するものとして説明する）に送られる。第２利用ユニット１０ａ、１０ｂに送られた熱源側冷媒は、第２利用側流量調節弁１０２ａ、１０２ｂに送られる。第２利用側流量調節弁１０２ａ、１０２ｂに送られた熱源側冷媒は、第２利用側流量調節弁１０２ａ、１０２ｂにおいて減圧されて、低圧の気液二相状態になり、第２利用側液冷媒管１０３ａ、１０３ｂを通じて、第２利用側熱交換器１０１ａ、１０１ｂに送られる。第２利用側熱交換器１０１ａ、１０１ｂに送られた低圧の熱源側冷媒は、第２利用側熱交換器１０１ａ、１０１ｂにおいて、利用側ファン１０５ａ、１０５ａによって供給される空気媒体と熱交換を行って蒸発し、これにより、室内の冷房を行う。第２利用側熱交換器１０１ａ、１０１ｂにおいて蒸発した低圧の熱源側冷媒は、第２利用側ガス冷媒管１０４ａ、１０４ｂを通じて、第２利用ユニット１０ａ、１０ｂからガス冷媒連絡管１４に送られる。 The high-pressure heat source side refrigerant sent to the discharge refrigerant communication tube 12 is sent to the first usage unit 4a. The high-pressure heat-source-side refrigerant sent to the first usage unit 4a is sent to the first usage-side heat exchanger 41a through the first usage-side discharge refrigerant tube 46a and the first usage-side discharge check valve 49a. The high-pressure heat-source-side refrigerant sent to the first usage-side heat exchanger 41a radiates heat by exchanging heat with the aqueous medium circulating in the aqueous-medium circuit 80a by the circulation pump 43a in the first usage-side heat exchanger 41a. . The high-pressure heat-source-side refrigerant radiated in the first usage-side heat exchanger 41a is sent from the first usage unit 4a to the liquid refrigerant communication tube 13 through the first usage-side flow rate adjustment valve 42a and the first usage-side liquid refrigerant tube 45a. It is done.
The heat-source-side refrigerant sent from the heat source unit 2 and the first usage unit 4a to the liquid refrigerant communication tube 13 merges in the liquid refrigerant communication tube 13, and the second usage units 10a and 10b (here, the second usage unit 10a). 10b will be described as heating operation). The heat-source-side refrigerant sent to the second usage units 10a and 10b is sent to the second usage-side flow rate adjustment valves 102a and 102b. The heat-source-side refrigerant sent to the second usage-side flow rate adjustment valves 102a, 102b is depressurized by the second usage-side flow rate adjustment valves 102a, 102b to be in a low-pressure gas-liquid two-phase state, and the second usage-side liquid refrigerant. It is sent to the second usage side heat exchangers 101a and 101b through the tubes 103a and 103b. The low-pressure heat source side refrigerant sent to the second usage side heat exchangers 101a and 101b exchanges heat with the air medium supplied by the usage side fans 105a and 105a in the second usage side heat exchangers 101a and 101b. This evaporates and cools the room. The low-pressure heat-source-side refrigerant evaporated in the second usage- side heat exchangers 101a and 101b is sent from the second usage units 10a and 10b to the gas refrigerant communication tube 14 through the second usage-side gas refrigerant tubes 104a and 104b.
　ガス冷媒連絡管１４に送られた低圧の熱源側冷媒は、熱源ユニット２に送られる。熱源ユニット２に送られた低圧の熱源側冷媒は、ガス側閉鎖弁３０、第２熱源側ガス冷媒管２３ｂ及び熱源側切換機構２３を通じて、熱源側アキュムレータ２８に送られる。熱源側アキュムレータ２８に送られた低圧の熱源側冷媒は、熱源側吸入管２１ｃを通じて、再び、熱源側圧縮機２１に吸入される。
　一方、水媒体回路８０ａにおいては、第１利用側熱交換器４１ａにおける熱源側冷媒の放熱によって水媒体回路８０ａを循環する水媒体が加熱される。第１利用側熱交換器４１ａにおいて加熱された水媒体は、第１利用側水出口管４８ａを通じて、循環ポンプ４３ａに吸入され、昇圧された後に、第１利用ユニット４ａから水媒体連絡管１６ａに送られる。水媒体連絡管１６ａに送られた水媒体は、水媒体側切換機構１６１ａを通じて、貯湯ユニット８ａ及び／又は温水暖房ユニット９ａに送られる。貯湯ユニット８ａに送られた水媒体は、熱交換コイル８２ａにおいて貯湯タンク８１ａ内の水媒体と熱交換を行って放熱し、これにより、貯湯タンク８１ａ内の水媒体を加熱する。 The low-pressure heat source side refrigerant sent to the gas refrigerant communication tube 14 is sent to the heat source unit 2. The low-pressure heat source side refrigerant sent to the heat source unit 2 is sent to the heat source side accumulator 28 through the gas side shut-off valve 30, the second heat source side gas refrigerant tube 23b, and the heat source side switching mechanism 23. The low-pressure heat source side refrigerant sent to the heat source side accumulator 28 is again sucked into the heat source side compressor 21 through the heat source side suction pipe 21c.
On the other hand, in the aqueous medium circuit 80a, the aqueous medium circulating in the aqueous medium circuit 80a is heated by the heat radiation of the heat source side refrigerant in the first usage-side heat exchanger 41a. The aqueous medium heated in the first usage-side heat exchanger 41a is drawn into the circulation pump 43a through the first usage-side water outlet pipe 48a, and after the pressure is increased, the first usage unit 4a supplies the aqueous medium communication pipe 16a. Sent. The aqueous medium sent to the aqueous medium communication pipe 16a is sent to the hot water storage unit 8a and / or the hot water heating unit 9a through the aqueous medium side switching mechanism 161a. The aqueous medium sent to the hot water storage unit 8a exchanges heat with the aqueous medium in the hot water storage tank 81a in the heat exchange coil 82a to radiate heat, thereby heating the aqueous medium in the hot water storage tank 81a.
　このようにして、第１利用ユニット４ａの給湯運転を行うとともに第２利用ユニット１０ａ及び／又は第２利用ユニット１０ｂの冷房運転を行う排熱給湯運転における動作が行われる。
　このように、このヒートポンプシステム３００では、排熱給湯運転を行う場合には、温調モードを熱源側放熱運転状態に切り換えたままでも給湯運転を行うことができるが、このような排熱給湯運転を行う場合には、第２利用側熱交換器１０１ａ、１０１ｂにおける蒸発負荷に見合う分の第１利用側熱交換器４１ａにおける放熱負荷によって給湯運転が行われることになるため、所望の給湯負荷をまかなうことができないこともあり、この場合には、温調モードを熱源側蒸発運転状態に切り換えて給湯運転を行う必要がある。また、春期や秋期等には、必要に応じて冷房運転や暖房運転を行うこともあり、この場合にも、温調モードの切り換えが必要である。すなわち、このヒートポンプシステム３００のような、排熱給湯運転を行うことが可能な構成であっても、温調モードの切り換えが必要であり、その意味において、このヒートポンプシステム３００も、第１利用ユニット４ａ及び第２利用ユニット１０ａ、１０ｂが個別に給湯運転、冷房運転又は暖房運転を選択して運転できないものとなっている。 In this way, the operation in the exhaust heat hot water supply operation in which the hot water supply operation of the first usage unit 4a is performed and the cooling operation of the second usage unit 10a and / or the second usage unit 10b is performed.
As described above, in the heat pump system 300, when performing the exhaust heat hot water supply operation, the hot water supply operation can be performed while the temperature control mode is switched to the heat source side heat radiation operation state. Is performed, the hot water supply operation is performed by the heat radiation load in the first usage-side heat exchanger 41a corresponding to the evaporation load in the second usage- side heat exchangers 101a and 101b. In this case, it is necessary to switch the temperature control mode to the heat source side evaporation operation state and perform the hot water supply operation. In spring and autumn, cooling operation and heating operation may be performed as necessary. In this case, the temperature control mode must be switched. That is, even in a configuration capable of performing the exhaust heat hot water supply operation, such as the heat pump system 300, the temperature control mode needs to be switched. In this sense, the heat pump system 300 is also the first usage unit. 4a and the second usage units 10a and 10b cannot be operated by individually selecting a hot water supply operation, a cooling operation or a heating operation.
　－温調モード切り換え制御－
　しかし、ユーザーは、このヒートポンプシステム３００を、第１実施形態のヒートポンプシステム１と同様、単に、第２利用ユニット１０ａ、１０ｂによる冷暖房装置と第１利用ユニット４ａ等による給湯装置とが併存したしたものと受け取ってしまうため、温調モードの切り換えの必要性を認識できず、温調モードの切り換えを忘れたり、切り換えミスを生じるおそれがあり、また、温調モードの切り換えも煩雑である。
　そこで、このヒートポンプシステム３００では、第２利用ユニット１０ａ、１０ｂに指令を行う第２利用側コントローラ１０８ａ、１０８ｂのうちの１つ（ここでは、第２利用側コントローラ１０８ａとする）が指令している温調モードとしての熱源側切換機構２３の切換状態とは異なる温調モードに切り換えて運転することが可能な温調モード切り換え制御を行うようにしている。 -Temperature control mode switching control-
However, the user simply uses the heat pump system 300 in the same manner as the heat pump system 1 of the first embodiment, in which a cooling / heating device using the second usage units 10a and 10b and a hot water supply device using the first usage unit 4a and the like coexist. Therefore, the necessity of switching the temperature control mode cannot be recognized, there is a risk of forgetting to switch the temperature control mode or causing a switching error, and switching of the temperature control mode is complicated.
Therefore, in this heat pump system 300, one of the second usage- side controllers 108a and 108b that commands the second usage units 10a and 10b (here, referred to as the second usage-side controller 108a) commands. Temperature control mode switching control that can be operated by switching to a temperature control mode different from the switching state of the heat source side switching mechanism 23 as the temperature control mode is performed.
　以下に、このヒートポンプシステム３００における温調モード切り換え制御の制御ロジックについて、図５を用いて説明する。この温調モード切り換え制御では、温調モードが熱源側放熱運転状態になっている（すなわち、第２利用ユニット１０ａ、１０ｂが冷房運転しているか、冷房運転を行っていなくても、第２利用側コントローラ１０８ａが温調モードを熱源側放熱運転状態になるように指令している）際において、第１利用側コントローラ７７ａから第１利用ユニット４ａに給湯運転が指令された場合（したがって、温調モードを熱源側蒸発運転状態しなければならない場合）には、温調モードを熱源側蒸発運転状態に切り換えて、第１利用ユニット４ａの給湯運転を行う運転である優先給湯運転（ステップＳ１７～Ｓ１９）が行われるようになっており、それ以外の場合には、指令されている温調モード（ここでは、第２利用側コントローラ１０８ａによって指令されている温調モード）における運転（ステップＳ１１、Ｓ１４）が行われるようになっている。 Hereinafter, the control logic of the temperature control mode switching control in the heat pump system 300 will be described with reference to FIG. In this temperature control mode switching control, the temperature control mode is in the heat source side heat radiation operation state (that is, even if the second usage units 10a and 10b are in the cooling operation or not in the cooling operation, the second usage When the side controller 108a commands the temperature control mode to enter the heat source side heat radiation operation state), when the hot water supply operation is commanded from the first usage side controller 77a to the first usage unit 4a (therefore, temperature regulation) In the case where the mode must be in the heat source side evaporation operation), the priority hot water supply operation (steps S17 to S19), which is an operation for switching the temperature control mode to the heat source side evaporation operation state and performing the hot water supply operation of the first usage unit 4a. In other cases, the commanded temperature adjustment mode (here, the second usage side controller 108a) Operation in the temperature control mode) is commanded (step S11, S14) is to be carried out.
　まず、ステップＳ１１の運転状態、すなわち、第２利用側コントローラ１０８ａによって指令されている温調モードにおける運転（図５では、この運転を「優先給湯運転＝ＯＦＦ」とする）が継続しているものとする。
　次に、ステップＳ１２において、条件Ａを満たすかどうかを判定する。ここで、条件Ａは、第２利用側コントローラ１０８ａによって指令されている温調モードが熱源側放熱運転状態（図５では、この状態を「温調モード＝冷房」とする）であり、かつ、所定の第３時間ｔｍ３が経過し（図５では、この状態を「ｔｍ３タイムアップ」とする）、かつ、第１利用側コントローラ７７ａによって第１利用ユニット４ａに給湯運転が指令されたかどうか（図５では、この指令がなされた状態を「給湯運転要求＝ＯＮ」とする）であり、かつ、第２利用ユニット１０ａ、１０ｂの冷房運転中に第１利用ユニット４ａの給湯運転を行う排熱給湯運転が行われていないかどうか（図５では、この排熱給湯運転が行われていない状態を「排熱給湯運転要求＝ＯＦＦ」とする）、これにより、温調モードが熱源側放熱運転状態になっている際に第１利用ユニット４ａに給湯運転が指令されたかどうかを判定する。ここで、時間ｔｍ３は、後述のステップＳ２０において設定される時間である。また、排熱給湯運転は、冷房運転を行っている際において、貯湯ユニット８ａの貯湯温度Ｔｗｈが所定の貯湯設定温度Ｔｗｈｓ以下になった場合に、自動的に、第１利用ユニット４ａが第１利用側熱交換器４１ａにおける熱源側冷媒の放熱によって水媒体を加熱する給湯運転を行うものである。そして、このステップＳ１２において、条件Ａを満たさないと判定された場合、すなわち、温調モードが熱源側蒸発運転状態である場合（図５では、この状態を「温調モード≠冷房」とする）、又は、第３時間ｔｍ３が経過していない場合、又は、第１利用側コントローラ７７ａによって第１利用ユニット４ａに給湯運転が指令されていない場合（すなわち、「給湯運転要求＝ＯＦＦ」）には、第２利用側コントローラ１０８ａによって指令されている温調モードにおける運転（すなわち、「優先給湯運転＝ＯＦＦ」）を継続し、条件Ａを満たすと判定された場合には、温調モードが熱源側放熱運転状態にあり、また、排熱給湯運転では所望の給湯負荷をまかなうことができない状態（給湯負荷が大きく、排熱給湯運転では、貯湯温度Ｔｗｈを所定の貯湯設定温度Ｔｗｈｓ以上にすることができない状態）となっているため、優先給湯運転（ステップＳ１７～Ｓ１９）に向けて、ステップＳ１３以降の処理に移行する。 First, the operation state of step S11, that is, the operation in the temperature control mode commanded by the second usage-side controller 108a (in FIG. 5, this operation is set to “priority hot water supply operation = OFF”) continues. And
Next, in step S12, it is determined whether or not the condition A is satisfied. Here, the condition A is that the temperature control mode commanded by the second usage side controller 108a is the heat source side heat radiation operation state (in FIG. 5, this state is “temperature control mode = cooling”), and Whether a predetermined third time tm3 has elapsed (in FIG. 5, this state is referred to as “tm3 time-up”), and whether or not a hot water supply operation has been commanded to the first usage unit 4a by the first usage-side controller 77a (FIG. 5). 5, the state in which this command is issued is “hot water supply operation request = ON”), and the exhaust heat hot water supply that performs the hot water supply operation of the first usage unit 4 a during the cooling operation of the second usage units 10 a and 10 b is performed. Whether or not the operation is performed (in FIG. 5, the state where the exhaust heat hot water supply operation is not performed is “exhaust heat hot water supply operation request = OFF”), whereby the temperature control mode is the heat source side heat radiation operation state In Water supply operation to the first usage unit 4a when that Tsu determines whether the commanded. Here, the time tm3 is a time set in step S20 described later. In the exhaust heat hot water supply operation, when the cooling operation is performed, when the hot water storage temperature Twh of the hot water storage unit 8a becomes equal to or lower than a predetermined hot water storage set temperature Twhs, the first usage unit 4a automatically becomes the first use unit 4a. A hot water supply operation is performed in which the aqueous medium is heated by the heat radiation of the heat source side refrigerant in the use side heat exchanger 41a. In Step S12, when it is determined that the condition A is not satisfied, that is, when the temperature control mode is the heat source side evaporation operation state (in FIG. 5, this state is “temperature control mode ≠ cooling”). Or, when the third time tm3 has not elapsed, or when the first usage-side controller 77a does not command the hot water supply operation to the first usage unit 4a (that is, “hot water supply operation request = OFF”). When the operation in the temperature control mode commanded by the second usage-side controller 108a (that is, “priority hot water supply operation = OFF”) is continued and it is determined that the condition A is satisfied, the temperature control mode is on the heat source side. In a heat dissipation operation state, and in a state where the desired hot water supply load cannot be provided in the exhaust heat hot water supply operation (the hot water supply load is large and in the exhaust heat hot water operation, the hot water storage temperature Twh Since that is the state that can not) be above a predetermined hot-water storage temperature setting Twhs, towards the priority hot-water supply operation (steps S17 ~ S19), the process proceeds to step S13 and subsequent steps.
　次に、ステップＳ１３、Ｓ１４では、条件Ａを満たす場合ではあるが、すぐに、優先給湯運転（ステップＳ１７～Ｓ１９）に移行するのではなく、ステップＳ１３において、所定の第１時間ｔｍ１のカウントを開始し、ステップＳ１１と同じく、第２利用側コントローラ１０８ａによって指令されている温調モードにおける運転（すなわち、「優先給湯運転＝ＯＦＦ」）を継続する。ここで、第１時間ｔｍ１は、ステップＳ１２の処理が終了してからステップＳ１５、Ｓ１６の処理が行われるまでの時間間隔に相当するものであり、数分から１０分程度に設定される。
　次に、ステップＳ１５において、条件Ｂを満たすかどうかを判定する。ここで、条件Ｂは、第２利用側コントローラ１０８ａによって指令されている温調モードが熱源側放熱運転状態（すなわち、「温調モード＝冷房」）であり、かつ、第１利用側コントローラ７７ａによって第１利用ユニット４ａに給湯運転が指令されたかどうか（すなわち、「給湯運転要求＝ＯＮ」）であり、かつ、第２利用ユニット１０ａ、１０ｂの冷房運転中に第１利用ユニット４ａの給湯運転を行う排熱給湯運転が行われていないかどうか（すなわち、「排熱給湯運転要求＝ＯＦＦ」）であり、かつ、第１時間ｔｍ１が経過したかどうか（図５では、この状態を「ｔｍ１タイムアップ」とする）、又は、外気温度Ｔｏが所定の低温条件温度Ｔｏｌより低いかどうか（図５では、この状態を「Ｔｏ＜Ｔｏｌ」とする）であり、これにより、ステップＳ１２において、条件Ａを満たす状態が第１時間ｔｍ１継続しており給湯運転の要求が確実なもの（例えば、排熱給湯運転では所望の給湯負荷をまかなうことができない状態）であるか、又は、外気温度Ｔｏが低温条件であるにもかかわらず、第２利用側コントローラ１０８ａによって指令されている温調モードが熱源側放熱運転状態（すなわち、「温調モード＝冷房」）になっているかを判定する。ここで、低温条件温度Ｔｏｌは、第２利用ユニット１０ａ、１０ｂの暖房運転を行うことが想定される最も高い温度に相当するものであり、１５℃程度に設定される。そして、このステップＳ１５において、条件Ｂを満たさないと判定された場合、すなわち、温調モードが熱源側蒸発運転状態である場合（すなわち、「温調モード≠冷房」）、又は、第１利用側コントローラ７７ａによって第１利用ユニット４ａに給湯運転が指令されていない場合（すなわち、「給湯運転要求＝ＯＦＦ」）、又は、第２利用ユニット１０ａ、１０ｂの冷房運転中に第１利用ユニット４ａの給湯運転を行う排熱給湯運転が行われている場合（図５では、この排熱給湯運転が行われている状態を「排熱給湯運転要求＝ＯＮ」とする）には、ステップＳ１６の条件Ｄを満たすものと判定して、ステップＳ１の第２利用側コントローラ１０８ａによって指令されている温調モードにおける運転（すなわち、「優先給湯運転＝ＯＦＦ」）を継続し、条件Ｂを満たすと判定された場合には、給湯運転の要求が確実なものとなっている状態、又は、外気温度Ｔｏが低温条件であるにもかかわらず第２利用側コントローラ１０８ａによって指令されている温調モードが熱源側放熱運転状態（すなわち、「温調モード＝冷房」）になっている状態であるため、優先給湯運転（ステップＳ１７～Ｓ１９）に移行する。 Next, in Steps S13 and S14, although the condition A is satisfied, the process does not immediately shift to the preferential hot water supply operation (Steps S17 to S19), but in Step S13, the predetermined first time tm1 is counted. As in step S11, the operation in the temperature control mode commanded by the second usage-side controller 108a (ie, “priority hot water supply operation = OFF”) is continued. Here, the first time tm1 corresponds to a time interval from the end of the process of step S12 to the process of steps S15 and S16, and is set to about several minutes to 10 minutes.
Next, in step S15, it is determined whether or not the condition B is satisfied. Here, the condition B is that the temperature control mode commanded by the second usage-side controller 108a is the heat-source side heat radiation operation state (that is, “temperature control mode = cooling”), and the first usage-side controller 77a It is determined whether the hot water supply operation is instructed to the first usage unit 4a (that is, “hot water supply operation request = ON”) and the hot water supply operation of the first usage unit 4a is performed during the cooling operation of the second usage units 10a and 10b. Whether or not the exhaust heat hot water supply operation to be performed is not performed (that is, “exhaust heat hot water supply operation request = OFF”), and whether or not the first time tm1 has elapsed (in FIG. Or the outside air temperature To is lower than a predetermined low temperature condition temperature Tol (in FIG. 5, this state is assumed to be “To <Tol”). In step S12, the state satisfying the condition A continues for the first time tm1, and the request for the hot water supply operation is certain (for example, a state in which a desired hot water supply load cannot be provided in the exhaust heat hot water supply operation), or Whether the temperature control mode commanded by the second usage side controller 108a is in the heat source side heat radiation operation state (that is, “temperature control mode = cooling”) even though the outside air temperature To is a low temperature condition. judge. Here, the low temperature condition temperature Tol corresponds to the highest temperature assumed to perform the heating operation of the second usage units 10a and 10b, and is set to about 15 ° C. In step S15, when it is determined that the condition B is not satisfied, that is, when the temperature control mode is the heat source side evaporation operation state (that is, “temperature control mode ≠ cooling”), or the first usage side The hot water supply operation of the first usage unit 4a is not commanded to the first usage unit 4a by the controller 77a (that is, “hot water supply operation request = OFF”) or during the cooling operation of the second usage units 10a and 10b. When the exhaust heat hot water supply operation for performing the operation is performed (in FIG. 5, the state in which the exhaust heat hot water supply operation is performed is “exhaust heat hot water operation request = ON”), the condition D in step S16 The operation in the temperature control mode commanded by the second usage-side controller 108a in step S1 (ie, “priority hot water supply operation = OFF”) is determined. If it is determined that the condition B is satisfied, the second usage controller 108a is in a state where the request for the hot water supply operation is certain or the outside air temperature To is a low temperature condition. Since the temperature control mode commanded by is the heat source side heat radiation operation state (that is, “temperature control mode = cooling”), the process proceeds to the priority hot water supply operation (steps S17 to S19).
　次に、ステップＳ１７～Ｓ１９では、まず、ステップＳ１７において、所定の第２時間ｔｍ２のカウントを開始する。ここで、第２時間ｔｍ２は、優先給湯運転を行う時間に相当するものであり、１０分から３０分程度に設定される。そして、ステップＳ１８において、第２利用側コントローラ１０８ａが温調モードを熱源側放熱運転状態（すなわち、「温調モード＝冷房」）に指令しているにもかかわらず、温調モードを熱源側蒸発運転状態に切り換えるとともに、循環ポンプ４３ａの起動や第１利用側流量調節弁４１ａの開操作等を行って第１利用ユニット４ａの給湯運転（すなわち、優先給湯運転）を開始する。
　ところで、このような優先給湯運転を行うために、温調モードを熱源側放熱運転状態から熱源側蒸発運転状態に切り換えると、第２利用ユニット１０ａ、１０ｂが暖房運転を行う状態に切り換えられることになり、優先給湯運転が開始されるまで第２利用ユニット１０ａ、１０ｂが冷房運転を行っていた場合には、第２利用ユニット１０ａ、１０ｂが暖房運転を行う状態になり、また、優先給湯運転中に第２利用側コントローラ１０８ａ、１０８ｂから第２利用ユニット１０ａ、１０ｂに冷房運転が指令された場合に暖房運転を開始してしまうため、室内の快適性が損なわれて好ましくない。そこで、このヒートポンプシステム３００では、第１実施形態のヒートポンプシステム１と同様に、優先給湯運転中は、第２利用ユニット１０ａ、１０ｂの冷房運転を禁止するようにしている。 Next, in steps S17 to S19, first, in step S17, counting of a predetermined second time tm2 is started. Here, the second time tm2 corresponds to the time for performing the priority hot water supply operation, and is set to about 10 to 30 minutes. In step S18, the second use side controller 108a commands the temperature control mode to the heat source side heat radiation operation state (that is, “temperature control mode = cooling”), but the temperature control mode is changed to the heat source side evaporation. While switching to the operating state, the circulation pump 43a is started and the first usage-side flow rate adjustment valve 41a is opened to start the hot water supply operation (that is, priority hot water supply operation) of the first usage unit 4a.
By the way, in order to perform such priority hot water supply operation, when the temperature control mode is switched from the heat source side heat radiation operation state to the heat source side evaporation operation state, the second usage units 10a and 10b are switched to a state in which heating operation is performed. When the second usage units 10a and 10b are performing the cooling operation until the priority hot water supply operation is started, the second usage units 10a and 10b are in a state of performing the heating operation, and the priority hot water supply operation is being performed. In addition, since the heating operation is started when the second usage- side controllers 108a and 108b are instructed to the second usage units 10a and 10b, the indoor comfort is impaired, which is not preferable. Therefore, in the heat pump system 300, as in the heat pump system 1 of the first embodiment, the cooling operation of the second usage units 10a and 10b is prohibited during the priority hot water supply operation.
　また、上述のように、優先給湯運転において、第２利用ユニット１０ａ、１０ｂの冷房運転を禁止する際に、第２利用側コントローラ１０８ａ、１０８ｂから冷房運転が指令されている第２利用ユニット１０ａ、１０ｂについて、利用側ファン１０５ａ、１０５ｂの運転も停止してしまうと、ユーザーが第２利用ユニット１０ａ、１０ｂの故障が発生したものと誤解するおそれがある。そこで、このヒートポンプシステム３００では、第１実施形態のヒートポンプシステム１と同様に、第２利用側コントローラ１０８ａ、１０８ｂから冷房運転が指令されている第２利用ユニット１０ａ、１０ｂについては、優先給湯運転中は、第２利用側流量調節弁１０２ａ、１０２ｂの閉操作等を行って冷房運転を停止した状態で利用側ファン１０５ａ、１０５ｂを運転するようにしている。ここで、利用側ファン１０５ａ、１０５ｂの運転周波数は、室内のドラフト防止のために、最低周波数にすることが好ましい。 In addition, as described above, in the priority hot water supply operation, when the cooling operation of the second usage units 10a and 10b is prohibited, the second usage unit 10a to which the cooling operation is instructed from the second usage- side controllers 108a and 108b, If the operation of the use side fans 105a and 105b is also stopped for 10b, the user may misunderstand that the failure of the second use units 10a and 10b has occurred. Thus, in the heat pump system 300, as in the heat pump system 1 of the first embodiment, the second usage units 10a and 10b for which the cooling operation is instructed from the second usage- side controllers 108a and 108b are in the priority hot water supply operation. Is configured to operate the usage- side fans 105a and 105b in a state where the cooling operation is stopped by closing the second usage-side flow rate adjusting valves 102a and 102b. Here, the operating frequency of the use side fans 105a and 105b is preferably set to the lowest frequency in order to prevent indoor drafts.
　さらに、上述のように、優先給湯運転において、第２利用ユニット１０ａ、１０ｂの冷房運転を停止することに連動して、第２利用側コントローラ１０８ａ、１０８ｂにおける第２利用ユニット１０ａ、１０ｂの運転状態の表示を変更（すなわち、冷房運転を停止に変更）してしまうと、ユーザーが第２利用ユニット１０ａ、１０ｂの故障が発生したものと誤解するおそれがある。そこで、このヒートポンプシステム３００では、第１実施形態のヒートポンプシステム１と同様に、優先給湯運転における第２利用ユニット１０ａ、１０ｂの冷房運転の停止中においても、第２利用側コントローラ１０８ａ、１０８ｂが冷房運転中である旨の表示を維持するようにしている。
　そして、この優先給湯運転は、ステップＳ１９において、条件Ｃを満たすまで継続される。ここで、条件Ｃは、第２利用側コントローラ１０８ａによって温調モードが熱源側蒸発運転状態に切り換えるように指令されるか（すなわち、「温調モード≠冷房」）、又は、第１利用側コントローラ７７ａによって第１利用ユニット４ａに給湯運転を停止する指令がされるか（すなわち、「給湯運転要求＝ＯＦＦ」）又は、外気温度Ｔｏが所定の高温条件温度Ｔｏｈより高い状態（図５では、この状態を「Ｔｏ＞Ｔｏｈ」とする）で第２時間ｔｍ２が経過するか（図５では、この状態を「ｔｍ２タイムアップ」とする）であり、これにより、ステップＳ１９において、優先給湯運転を行わなくても給湯運転が可能な状態になったか、又は、給湯運転が不要になったか、又は、優先給湯運転が第２時間ｔｍ２継続したかを判定する。ここで、高温条件温度Ｔｏｈは、第２利用ユニット１０ａ、１０ｂの冷房運転を行うことが想定される最も低い温度に相当するものであり、２０℃程度に設定される。そして、優先給湯運転は、このステップＳ１９において、条件Ｃを満たすと判定されるまで、すなわち、優先給湯運転を行わなくても給湯運転が可能な状態になり、又は、給湯運転が不要になり、又は、優先給湯運転が第２時間ｔｍ２継続するまで継続され、その後、第２利用側コントローラ１０８ａが指令している温調モードにおける運転に戻す処理（ステップＳ２０、Ｓ１１）に移行する。 Further, as described above, in the priority hot water supply operation, in conjunction with stopping the cooling operation of the second usage units 10a and 10b, the operating state of the second usage units 10a and 10b in the second usage- side controllers 108a and 108b. If the display is changed (that is, the cooling operation is changed to stop), the user may misunderstand that the failure of the second usage units 10a and 10b has occurred. Therefore, in the heat pump system 300, as in the heat pump system 1 of the first embodiment, the second usage- side controllers 108a and 108b are operated even when the cooling operation of the second usage units 10a and 10b in the priority hot water supply operation is stopped. An indication that the vehicle is in operation is maintained.
And this priority hot-water supply driving | operation is continued until the conditions C are satisfy | filled in step S19. Here, the condition C is that the second usage side controller 108a commands the temperature control mode to switch to the heat source side evaporation operation state (that is, “temperature control mode ≠ cooling”), or the first usage side controller 77a instructs the first usage unit 4a to stop the hot water supply operation (ie, “hot water supply operation request = OFF”) or the outside air temperature To is higher than a predetermined high temperature condition temperature Toh (in FIG. Whether the second time tm2 elapses when the state is “To> Toh” (in FIG. 5, this state is “tm2 time-up”). Thus, in step S19, the priority hot water supply operation is performed. Without it, it is determined whether the hot water supply operation is possible, whether the hot water supply operation is no longer necessary, or whether the priority hot water supply operation has continued for the second time tm2. Here, the high temperature condition temperature Toh corresponds to the lowest temperature at which the cooling operation of the second usage units 10a and 10b is assumed, and is set to about 20 ° C. Then, the priority hot water supply operation is in a state in which it is determined in step S19 that the condition C is satisfied, that is, the hot water supply operation can be performed without performing the priority hot water supply operation, or the hot water supply operation becomes unnecessary. Alternatively, the priority hot water supply operation is continued until the second time tm2 is continued, and thereafter, the process shifts to the process (steps S20 and S11) for returning to the operation in the temperature control mode commanded by the second usage-side controller 108a.
　次に、ステップＳ２０、Ｓ１１では、まず、ステップＳ２０において、所定の第３時間ｔｍ３のカウントを開始し、そして、ステップＳ１１において、第２利用側コントローラ１０８ａが指令している温調モードにおける運転に戻す処理が行われる。ここで、第３時間ｔｍ３は、優先給湯運転が要求されている場合において、優先給湯運転を行なわずに第２利用側コントローラ１０８ａが指令している温調モードにおける運転を行う時間に相当するものであり、５分から２５分程度に設定される。例えば、第２利用ユニット１０ａ、１０ｂの冷房運転中に第１利用ユニット４ａの給湯運転が要求された場合には、優先給湯運転が第２時間ｔｍ２だけ行われ、冷房運転が第３時間ｔｍ３だけ行われることになる。
　以上のような温調モード切り換え制御によって、このヒートポンプシステム３００では、第２利用ユニット１０ａ、１０ｂの運転が停止している場合、又は、冷房運転が行われている場合（すなわち、第２利用側コントローラ１０８ａが指令している温調モードが熱源側放熱運転状態である場合）において、第１利用ユニット１０ａに給湯運転が要求された場合（すなわち、第１利用側コントローラ７７ａから第１利用ユニット４ａに給湯運転が指令された場合）には、第２利用側コントローラ１０８ａが温調モードを熱源側放熱運転状態に指令しているにもかかわらず、温調モードを熱源側蒸発運転状態に切り換えて優先給湯運転を行うことができる、すなわち、第２利用側コントローラ１０８ａが指令している温調モードとしての熱源側切換機構２３の切換状態とは異なる温調モードに切り換えて運転することが可能になっている。 Next, in steps S20 and S11, first, in step S20, counting of a predetermined third time tm3 is started, and in step S11, the operation in the temperature control mode commanded by the second usage-side controller 108a is started. Processing to return is performed. Here, the third time tm3 corresponds to the time during which the operation in the temperature control mode commanded by the second use side controller 108a is performed without performing the priority hot water supply operation when the priority hot water supply operation is requested. It is set to about 5 to 25 minutes. For example, when the hot water supply operation of the first usage unit 4a is requested during the cooling operation of the second usage units 10a and 10b, the priority hot water supply operation is performed for the second time tm2, and the cooling operation is performed for the third time tm3. Will be done.
In the heat pump system 300, when the operation of the second usage units 10a and 10b is stopped or the cooling operation is being performed by the temperature control mode switching control as described above (that is, the second usage side). When the temperature control mode commanded by the controller 108a is the heat source side heat radiation operation state), when the hot water supply operation is requested from the first usage unit 10a (that is, from the first usage side controller 77a to the first usage unit 4a When the second use-side controller 108a commands the temperature control mode to the heat source side heat radiation operation state, the temperature control mode is switched to the heat source side evaporation operation state. The priority hot water supply operation can be performed, that is, the heat source side as the temperature control mode commanded by the second usage side controller 108a It becomes possible to operate by switching to a different temperature control mode the switching state of the changeover mechanism 23.
　これにより、このヒートポンプシステム３００においても、第１実施形態のヒートポンプシステム１と同様の作用効果を得ることができる。
　（第４実施形態）
　上述の第２実施形態におけるヒートポンプシステム２００（図３参照）においては、第１利用ユニット４ａの給湯運転を行うとともに第２利用ユニット１０ａ、１０ｂの冷房運転を行うことができないため、このような運転（以下、「排熱給湯運転」とする）を行うことができれば、夏期等の冷房運転が行われている運転状態において、第２利用側熱交換器１０１ａ、１０１ｂにおける蒸発負荷（すなわち、冷房負荷）に見合う分の第１利用側熱交換器４ａにおける放熱負荷（すなわち、給湯負荷）によって給湯運転を行うことができるようになるため、省エネルギー化の観点から好ましい。 Thereby, also in this heat pump system 300, the effect similar to the heat pump system 1 of 1st Embodiment can be acquired.
(Fourth embodiment)
In the heat pump system 200 (see FIG. 3) in the second embodiment described above, the hot water supply operation of the first usage unit 4a cannot be performed and the cooling operation of the second usage units 10a and 10b cannot be performed. If it can be performed (hereinafter referred to as “exhaust heat hot water supply operation”), the evaporation load (that is, the cooling load) in the second usage- side heat exchangers 101a and 101b in the operation state in which the cooling operation is performed in summer or the like. ), The hot water supply operation can be performed by the heat radiation load (that is, the hot water supply load) in the first usage-side heat exchanger 4a, which is preferable from the viewpoint of energy saving.
　そこで、このヒートポンプシステム４００では、上述の第２実施形態にかかるヒートポンプシステム１（図３参照）の構成において、図６に示されるように、第２利用側熱交換器１０１ａ、１０１ｂを熱源側冷媒の蒸発器として機能させることで空気媒体を冷却するとともに、第１利用側熱交換器４１ａを熱源側冷媒の放熱器として機能させることで水媒体を加熱する運転である排熱給湯運転を行うことができるようにしている。以下、このヒートポンプシステム４００の構成について説明する。
　＜構成＞
　－全体－
　図６は、本発明の第４実施形態にかかるヒートポンプシステム４００の概略構成図である。ヒートポンプシステム４００は、蒸気圧縮式のヒートポンプサイクルを利用して水媒体を加熱する運転等を行うことが可能な装置である。 Therefore, in this heat pump system 400, in the configuration of the heat pump system 1 (see FIG. 3) according to the second embodiment described above, as shown in FIG. 6, the second usage side heat exchangers 101a and 101b are replaced with the heat source side refrigerant. The air medium is cooled by functioning as an evaporator, and the exhaust heat hot water supply operation, which is an operation for heating the aqueous medium, is performed by causing the first use side heat exchanger 41a to function as a radiator of the heat source side refrigerant. To be able to. Hereinafter, the configuration of the heat pump system 400 will be described.
<Configuration>
-The entire-
FIG. 6 is a schematic configuration diagram of a heat pump system 400 according to the fourth embodiment of the present invention. The heat pump system 400 is an apparatus capable of performing an operation for heating an aqueous medium using a vapor compression heat pump cycle.
　ヒートポンプシステム４００は、主として、熱源ユニット２と、第１利用ユニット４ａと、第２利用ユニット１０ａ、１０ｂと、吐出冷媒連絡管１２と、液冷媒連絡管１３と、ガス冷媒連絡管１４と、貯湯ユニット８ａと、温水暖房ユニット９ａと、水媒体連絡管１５ａと、水媒体連絡管１６ａとを備えており、熱源ユニット２と第１利用ユニット４ａと第２利用ユニット１０ａとが冷媒連絡管１２、１３、１４を介して接続されることによって、熱源側冷媒回路２０を構成し、第１利用ユニット４ａが利用側冷媒回路４０ａを構成し、第１利用ユニット４ａと貯湯ユニット８ａと温水暖房ユニット９ａとが水媒体連絡管１５ａ、１６ａを介して接続されることによって、水媒体回路８０ａを構成している。熱源側冷媒回路２０には、ＨＦＣ系冷媒の一種であるＨＦＣ－４１０Ａが熱源側冷媒として封入されており、また、ＨＦＣ系冷媒に対して相溶性を有するエステル系又はエーテル系の冷凍機油が熱源側圧縮機２１の潤滑のために封入されている。また、利用側冷媒回路４０ａには、ＨＦＣ系冷媒の一種であるＨＦＣ－１３４ａが利用側冷媒として封入されており、また、ＨＦＣ系冷媒に対して相溶性を有するエステル系又はエーテル系の冷凍機油が利用側圧縮機６２ａの潤滑のために封入されている。尚、利用側冷媒としては、高温の冷凍サイクルに有利な冷媒を使用されるという観点から、飽和ガス温度６５℃に相当する圧力がゲージ圧で高くとも２．８ＭＰａ以下、好ましくは、２．０ＭＰａ以下の冷媒を使用することが好ましい。そして、ＨＦＣ－１３４ａは、このような飽和圧力特性を有する冷媒の一種である。また、水媒体回路８０ａには、水媒体としての水が循環するようになっている。 The heat pump system 400 mainly includes a heat source unit 2, a first usage unit 4a, second usage units 10a and 10b, a discharge refrigerant communication tube 12, a liquid refrigerant communication tube 13, a gas refrigerant communication tube 14, and hot water storage. The unit 8a, the hot water heating unit 9a, the aqueous medium communication pipe 15a, and the aqueous medium communication pipe 16a are provided, and the heat source unit 2, the first usage unit 4a, and the second usage unit 10a are connected to the refrigerant communication pipe 12, 13 and 14 constitutes the heat source side refrigerant circuit 20, the first usage unit 4a constitutes the usage side refrigerant circuit 40a, the first usage unit 4a, the hot water storage unit 8a, and the hot water heating unit 9a. Are connected via the aqueous medium communication pipes 15a and 16a to constitute an aqueous medium circuit 80a. In the heat source side refrigerant circuit 20, HFC-410A, which is a kind of HFC refrigerant, is sealed as a heat source refrigerant, and an ester or ether refrigerating machine oil compatible with the HFC refrigerant is used as the heat source. It is enclosed for lubrication of the side compressor 21. Further, HFC-134a, which is a kind of HFC refrigerant, is sealed in the use side refrigerant circuit 40a as a use side refrigerant, and ester or ether type refrigerating machine oil having compatibility with the HFC refrigerant. Is enclosed for lubrication of the use side compressor 62a. In addition, as a use side refrigerant | coolant, from a viewpoint that the refrigerant | coolant advantageous to a high temperature refrigerating cycle is used, the pressure corresponding to saturation gas temperature 65 degreeC is 2.8 Mpa or less at a gauge pressure at most, Preferably, it is 2.0 Mpa The following refrigerants are preferably used. HFC-134a is a kind of refrigerant having such saturation pressure characteristics. Further, water as an aqueous medium circulates in the aqueous medium circuit 80a.
　尚、このヒートポンプシステム４００の構成は、第２利用ユニット１０ａ、１０ｂ、貯湯ユニット８ａ、温水暖房ユニット９ａ、液冷媒連絡管１３、ガス冷媒連絡管１４、水媒体連絡管１５ａ、１６ａ、第１利用側コントローラ７７ａ、及び、第２利用側コントローラ１０８ａ、１０８ｂの構成については、第２実施形態におけるヒートポンプシステム２００（図３参照）と同様の構成であり、また、熱源ユニット２及び吐出冷媒連絡管１２の構成については、第３実施形態におけるヒートポンプシステム３００（図４参照）と同様の構成であるため、これらの構成については、同じ符号を付して説明を省略し、第１利用ユニット４ａの構成のみについて説明を行う。
　－第１利用ユニット－
　第１利用ユニット４ａは、屋内に設置されており、冷媒連絡管１２、１３を介して熱源ユニット２及び第２利用ユニット１０ａに接続されており、熱源側冷媒回路２０の一部を構成している。また、第１利用ユニット４ａは、利用側冷媒回路４０ａを構成している。さらに、第１利用ユニット４ａは、水媒体連絡管１５ａ、１６ａを介して貯湯ユニット８ａ及び温水暖房ユニット９ａに接続されており、水媒体回路８０ａの一部を構成している。 The configuration of the heat pump system 400 includes the second usage units 10a and 10b, the hot water storage unit 8a, the hot water heating unit 9a, the liquid refrigerant communication tube 13, the gas refrigerant communication tube 14, the aqueous medium communication tubes 15a and 16a, and the first usage. The configurations of the side controller 77a and the second usage side controllers 108a and 108b are the same as those of the heat pump system 200 (see FIG. 3) in the second embodiment, and the heat source unit 2 and the discharge refrigerant communication pipe 12 are the same. Since the configuration is the same as the configuration of the heat pump system 300 (see FIG. 4) in the third embodiment, these configurations are denoted by the same reference numerals and description thereof is omitted, and the configuration of the first usage unit 4a. Only the explanation will be given.
-First use unit-
The first usage unit 4a is installed indoors, is connected to the heat source unit 2 and the second usage unit 10a via the refrigerant communication pipes 12 and 13, and constitutes a part of the heat source side refrigerant circuit 20. Yes. Moreover, the 1st utilization unit 4a comprises the utilization side refrigerant circuit 40a. Furthermore, the 1st utilization unit 4a is connected to the hot water storage unit 8a and the hot water heating unit 9a via the aqueous medium communication pipes 15a and 16a, and constitutes a part of the aqueous medium circuit 80a.
　第１利用ユニット４ａは、主として、第１利用側熱交換器４１ａと、第１利用側流量調節弁４２ａと、利用側圧縮機６２ａと、冷媒－水熱交換器６５ａと、冷媒－水熱交側流量調節弁６６ａと、利用側アキュムレータ６７ａと、循環ポンプ４３ａとを有している。
　ここで、第１利用側熱交換器４１ａには、その熱源側冷媒が流れる流路のガス側に、第２実施形態におけるヒートポンプシステム２００（図３参照）のようなガス冷媒連絡管１４に接続された第１利用側ガス冷媒管５４ａに代えて、吐出冷媒連絡管１２が接続された第１利用側吐出冷媒管４６ａが接続されている。第１利用側吐出冷媒管４６ａには、吐出冷媒連絡管１２から第１利用側熱交換器４１ａへ向かう熱源側冷媒の流れを許容し、第１利用側熱交換器４１ａから吐出冷媒連絡管１２へ向かう熱源側冷媒の流れを禁止する第１利用側吐出逆止弁４９ａが設けられている。 The first usage unit 4a mainly includes a first usage-side heat exchanger 41a, a first usage-side flow rate adjustment valve 42a, a usage-side compressor 62a, a refrigerant-water heat exchanger 65a, and a refrigerant-hydrothermal exchange. It has a side flow rate adjustment valve 66a, a use side accumulator 67a, and a circulation pump 43a.
Here, the first use side heat exchanger 41a is connected to the gas refrigerant communication pipe 14 like the heat pump system 200 (see FIG. 3) in the second embodiment on the gas side of the flow path through which the heat source side refrigerant flows. Instead of the first use side gas refrigerant pipe 54a, a first use side discharge refrigerant pipe 46a to which the discharge refrigerant communication pipe 12 is connected is connected. The first use side discharge refrigerant pipe 46a allows the flow of the heat source side refrigerant from the discharge refrigerant communication pipe 12 toward the first use side heat exchanger 41a, and is discharged from the first use side heat exchanger 41a to the discharge refrigerant communication pipe 12. A first usage-side discharge check valve 49a that prohibits the flow of the heat source side refrigerant toward the first side is provided.
　尚、利用ユニット４ａは、第１利用側ガス冷媒管５４ａに代えて、第１利用側吐出冷媒管４６ａが接続されている点を除いた構成については、第２実施形態におけるヒートポンプシステム２００（図３参照）と同様であるため、ここでは、同じ符号を付して説明を省略する。
　また、ヒートポンプシステム４００には、第１及び第２利用側コントローラの設定や指令によって、以下の運転や各種制御を行う制御部（図示せず）が設けられている。
　＜動作＞
　次に、ヒートポンプシステム４００の動作について説明する。
　ヒートポンプシステム４００の運転としては、第１利用ユニット４ａの給湯運転（すなわち、貯湯ユニット８ａ及び／又は温水暖房ユニット９ａの運転）のみを行う給湯運転と、第２利用ユニット１０ａ及び／又は第２利用ユニット１０ｂの冷房運転のみを行う冷房運転と、第２利用ユニット１０ａ及び／又は第２利用ユニット１０ｂの暖房運転のみを行う暖房運転と、第１利用ユニット４ａの給湯運転を行うとともに第２利用ユニット１０ａ及び／又は第２利用ユニット１０ｂの暖房運転を行う給湯暖房運転と、第１利用ユニット４ａの給湯運転を行うとともに第２利用ユニット１０ａ及び／又は第２利用ユニット１０ｂの冷房運転を行う排熱給湯運転とがある。 Note that the usage unit 4a has a configuration in which the first usage-side discharge refrigerant pipe 46a is connected in place of the first usage-side gas refrigerant pipe 54a except for the heat pump system 200 in the second embodiment (see FIG. 3), the same reference numerals are given here, and description thereof is omitted.
The heat pump system 400 is provided with a control unit (not shown) that performs the following operations and various controls according to the settings and commands of the first and second usage-side controllers.
<Operation>
Next, the operation of the heat pump system 400 will be described.
The operation of the heat pump system 400 includes a hot water supply operation in which only the hot water supply operation of the first usage unit 4a (that is, the operation of the hot water storage unit 8a and / or the hot water heating unit 9a), the second usage unit 10a and / or the second usage. A cooling operation that performs only the cooling operation of the unit 10b, a heating operation that performs only the heating operation of the second usage unit 10a and / or the second usage unit 10b, and a hot water supply operation of the first usage unit 4a and the second usage unit Hot water supply and heating operation for performing heating operation of 10a and / or the second usage unit 10b, and exhaust heat for performing cooling operation of the second usage unit 10a and / or the second usage unit 10b while performing the hot water supply operation of the first usage unit 4a There is hot water operation.
　以下、ヒートポンプシステム４００の５つの運転における動作について説明する。
　－給湯運転－
　第１利用ユニット４ａの給湯運転のみを行う場合には、熱源側冷媒回路２０においては、熱源側切換機構２３が熱源側蒸発運転状態（図６の熱源側切換機構２３の破線で示された状態）に切り換えられ、吸入戻し膨張弁２６ａ及び第２利用側流量調節弁１０２ａ、１０２ｂが閉止された状態になる。また、水媒体回路８０ａにおいては、水媒体切換機構１６１ａが貯湯ユニット８ａ及び／又は温水暖房ユニット９ａに水媒体を供給する状態に切り換えられる。ここでは、第２利用側コントローラ１０８ａ、１０８ｂのうちの１つによって、温調モードとしての熱源側切換機構２３の切換状態を熱源側蒸発運転状態に切り換えた上で、第１利用側コントローラ７７ａの運転指令によって、第１利用ユニット４ａ（及び、貯湯ユニット８ａ及び／又は温水暖房ユニット９ａ）の運転（給湯運転）が行われる。 Hereinafter, operations in five operations of the heat pump system 400 will be described.
-Hot water operation-
When only the hot water supply operation of the first usage unit 4a is performed, in the heat source side refrigerant circuit 20, the heat source side switching mechanism 23 is in the heat source side evaporation operation state (the state indicated by the broken line of the heat source side switching mechanism 23 in FIG. 6). ) And the suction return expansion valve 26a and the second usage side flow rate adjustment valves 102a, 102b are closed. In the aqueous medium circuit 80a, the aqueous medium switching mechanism 161a is switched to a state in which the aqueous medium is supplied to the hot water storage unit 8a and / or the hot water heating unit 9a. Here, the switching state of the heat source side switching mechanism 23 as the temperature control mode is switched to the heat source side evaporation operation state by one of the second usage side controllers 108a and 108b, and then the first usage side controller 77a. The operation (hot water supply operation) of the first usage unit 4a (and the hot water storage unit 8a and / or the hot water heating unit 9a) is performed according to the operation command.
　このような状態の熱源側冷媒回路２０において、冷凍サイクルにおける低圧の熱源側冷媒は、熱源側吸入管２１ｃを通じて、熱源側圧縮機２１に吸入され、冷凍サイクルにおける高圧まで圧縮された後に、熱源側吐出管２１ｂに吐出される。熱源側吐出管２１ｂに吐出された高圧の熱源側冷媒は、油分離器２２ａにおいて冷凍機油が分離される。油分離器２２ａにおいて熱源側冷媒から分離された冷凍機油は、油戻し管２２ｂを通じて、熱源側吸入管２１ｃに戻される。冷凍機油が分離された高圧の熱源側冷媒は、熱源側吐出分岐管２１ｄ及び吐出側閉鎖弁３１を通じて、熱源ユニット２から吐出冷媒連絡管１２に送られる。
　吐出冷媒連絡管１２に送られた高圧の熱源側冷媒は、第１利用ユニット４ａに送られる。第１利用ユニット４ａに送られた高圧の熱源側冷媒は、第１利用側吐出冷媒管４６ａ及び第１利用側吐出逆止弁４９ａを通じて、第１利用側熱交換器４１ａに送られる。第１利用側熱交換器４１ａに送られた高圧の熱源側冷媒は、第１利用側熱交換器４１ａにおいて、利用側冷媒回路４０ａを循環する冷凍サイクルにおける低圧の利用側冷媒と熱交換を行って放熱する。第１利用側熱交換器４１ａにおいて放熱した高圧の熱源側冷媒は、第１利用側流量調節弁４２ａ及び第１利用側液冷媒管４５ａを通じて、第１利用ユニット４ａから液冷媒連絡管１３に送られる。 In the heat source side refrigerant circuit 20 in such a state, the low pressure heat source side refrigerant in the refrigeration cycle is sucked into the heat source side compressor 21 through the heat source side suction pipe 21c and compressed to a high pressure in the refrigeration cycle, and then the heat source side refrigerant circuit 20 is cooled. It is discharged to the discharge pipe 21b. The high pressure heat source side refrigerant discharged to the heat source side discharge pipe 21b is separated from the refrigerating machine oil in the oil separator 22a. The refrigerating machine oil separated from the heat source side refrigerant in the oil separator 22a is returned to the heat source side suction pipe 21c through the oil return pipe 22b. The high-pressure heat-source-side refrigerant from which the refrigeration oil has been separated is sent from the heat-source unit 2 to the discharge refrigerant communication tube 12 through the heat-source-side discharge branch pipe 21d and the discharge-side shut-off valve 31.
The high-pressure heat source side refrigerant sent to the discharge refrigerant communication tube 12 is sent to the first usage unit 4a. The high-pressure heat-source-side refrigerant sent to the first usage unit 4a is sent to the first usage-side heat exchanger 41a through the first usage-side discharge refrigerant tube 46a and the first usage-side discharge check valve 49a. The high-pressure heat-source-side refrigerant sent to the first usage-side heat exchanger 41a exchanges heat with the low-pressure usage-side refrigerant in the refrigeration cycle circulating in the usage-side refrigerant circuit 40a in the first usage-side heat exchanger 41a. To dissipate heat. The high-pressure heat-source-side refrigerant radiated in the first usage-side heat exchanger 41a is sent from the first usage unit 4a to the liquid refrigerant communication tube 13 through the first usage-side flow rate adjustment valve 42a and the first usage-side liquid refrigerant tube 45a. It is done.
　液冷媒連絡管１３に送られた熱源側冷媒は、熱源ユニット２に送られる。熱源ユニット２に送られた熱源側冷媒は、液側閉鎖弁２９を通じて、過冷却器２７に送られる。過冷却器２７に送られた熱源側冷媒は、吸入戻し管２６に熱源側冷媒が流れていないため、熱交換を行うことなく、熱源側膨張弁２５に送られる。熱源側膨張弁２５に送られた熱源側冷媒は、熱源側膨張弁２５において減圧されて、低圧の気液二相状態になり、熱源側液冷媒管２４ａを通じて、熱源側熱交換器２４に送られる。熱源側熱交換器２４に送られた低圧の冷媒は、熱源側熱交換器２４において、熱源側ファン３２によって供給される室外空気と熱交換を行って蒸発する。熱源側熱交換器２４において蒸発した低圧の熱源側冷媒は、第１熱源側ガス冷媒管２３ａ及び熱源側切換機構２３を通じて、熱源側アキュムレータ２８に送られる。熱源側アキュムレータ２８に送られた低圧の熱源側冷媒は、熱源側吸入管２１ｃを通じて、再び、熱源側圧縮機２１に吸入される。 The heat source side refrigerant sent to the liquid refrigerant communication tube 13 is sent to the heat source unit 2. The heat source side refrigerant sent to the heat source unit 2 is sent to the supercooler 27 through the liquid side shut-off valve 29. The heat source side refrigerant sent to the subcooler 27 is sent to the heat source side expansion valve 25 without performing heat exchange because the heat source side refrigerant does not flow through the suction return pipe 26. The heat source side refrigerant sent to the heat source side expansion valve 25 is depressurized by the heat source side expansion valve 25 to be in a low-pressure gas-liquid two-phase state, and sent to the heat source side heat exchanger 24 through the heat source side liquid refrigerant tube 24a. It is done. The low-pressure refrigerant sent to the heat source side heat exchanger 24 evaporates by exchanging heat with outdoor air supplied by the heat source side fan 32 in the heat source side heat exchanger 24. The low-pressure heat source side refrigerant evaporated in the heat source side heat exchanger 24 is sent to the heat source side accumulator 28 through the first heat source side gas refrigerant tube 23a and the heat source side switching mechanism 23. The low-pressure heat source side refrigerant sent to the heat source side accumulator 28 is again sucked into the heat source side compressor 21 through the heat source side suction pipe 21c.
　一方、利用側冷媒回路４０ａにおいては、第１利用側熱交換器４１ａにおける熱源側冷媒の放熱によって利用側冷媒回路４０ａを循環する冷凍サイクルにおける低圧の利用側冷媒が加熱されて蒸発する。第１利用側熱交換器４１ａにおいて蒸発した低圧の利用側冷媒は、第２カスケード側ガス冷媒管６９ａを通じて、利用側アキュムレータ６７ａに送られる。利用側アキュムレータ６７ａに送られた低圧の利用側冷媒は、カスケード側吸入管７１ａを通じて、利用側圧縮機６２ａに吸入され、冷凍サイクルにおける高圧まで圧縮された後に、カスケード側吐出管７０ａに吐出される。カスケード側吐出管７０ａに吐出された高圧の利用側冷媒は、第１カスケード側ガス冷媒管７２ａを通じて、冷媒－水熱交換器６５ａに送られる。冷媒－水熱交換器６５ａに送られた高圧の利用側冷媒は、冷媒－水熱交換器６５ａにおいて、循環ポンプ４３ａによって水媒体回路８０ａを循環する水媒体と熱交換を行って放熱する。冷媒－水熱交換器６５ａにおいて放熱した高圧の利用側冷媒は、冷媒－水熱交側流量調節弁６６ａにおいて減圧されて、低圧の気液二相状態になり、カスケード側液冷媒管６８ａを通じて、再び、第１利用側熱交換器４１ａに送られる。 On the other hand, in the usage-side refrigerant circuit 40a, the low-pressure usage-side refrigerant in the refrigeration cycle circulating in the usage-side refrigerant circuit 40a is heated and evaporated by the heat radiation of the heat source-side refrigerant in the first usage-side heat exchanger 41a. The low-pressure usage-side refrigerant evaporated in the first usage-side heat exchanger 41a is sent to the usage-side accumulator 67a through the second cascade-side gas refrigerant tube 69a. The low-pressure use-side refrigerant sent to the use-side accumulator 67a is sucked into the use-side compressor 62a through the cascade-side suction pipe 71a, compressed to a high pressure in the refrigeration cycle, and then discharged to the cascade-side discharge pipe 70a. . The high-pressure use-side refrigerant discharged to the cascade-side discharge pipe 70a is sent to the refrigerant-water heat exchanger 65a through the first cascade-side gas refrigerant pipe 72a. The high-pressure use-side refrigerant sent to the refrigerant-water heat exchanger 65a radiates heat by exchanging heat with the aqueous medium circulating in the aqueous medium circuit 80a by the circulation pump 43a in the refrigerant-water heat exchanger 65a. The high-pressure use-side refrigerant that has radiated heat in the refrigerant-water heat exchanger 65a is decompressed in the refrigerant-water heat exchange side flow rate control valve 66a to become a low-pressure gas-liquid two-phase state, and passes through the cascade-side liquid refrigerant pipe 68a. Again, it is sent to the 1st utilization side heat exchanger 41a.
　また、水媒体回路８０ａにおいては、冷媒－水熱交換器６５ａにおける利用側冷媒の放熱によって水媒体回路８０ａを循環する水媒体が加熱される。冷媒－水熱交換器６５ａにおいて加熱された水媒体は、第１利用側水出口管４８ａを通じて、循環ポンプ４３ａに吸入され、昇圧された後に、第１利用ユニット４ａから水媒体連絡管１６ａに送られる。貯湯ユニット８ａに送られた水媒体は、熱交換コイル８２ａにおいて貯湯タンク８１ａ内の水媒体と熱交換を行って放熱し、これにより、貯湯タンク８１ａ内の水媒体を加熱する。温水暖房ユニット９ａに送られた水媒体は、熱交換パネル９１ａにおいて放熱し、これにより、室内の壁際等を加熱したり室内の床を加熱する。
　このようにして、第１利用ユニット４ａの給湯運転のみを行う給湯運転における動作が行われる。 In the aqueous medium circuit 80a, the aqueous medium circulating in the aqueous medium circuit 80a is heated by the heat radiation of the use-side refrigerant in the refrigerant-water heat exchanger 65a. The aqueous medium heated in the refrigerant-water heat exchanger 65a is drawn into the circulation pump 43a through the first usage-side water outlet pipe 48a, and after being pressurized, is sent from the first usage unit 4a to the aqueous medium communication pipe 16a. It is done. The aqueous medium sent to the hot water storage unit 8a exchanges heat with the aqueous medium in the hot water storage tank 81a in the heat exchange coil 82a to radiate heat, thereby heating the aqueous medium in the hot water storage tank 81a. The aqueous medium sent to the hot water heating unit 9a dissipates heat in the heat exchange panel 91a, thereby heating the indoor wall or the like or heating the indoor floor.
Thus, the operation | movement in the hot water supply operation which performs only the hot water supply operation of the 1st utilization unit 4a is performed.
　－冷房運転－
　第２利用ユニット１０ａ及び／又は第２利用ユニット１０ｂの冷房運転のみを行う場合には、熱源側冷媒回路２０においては、熱源側切換機構２３が熱源側放熱運転状態（図６の熱源側切換機構２３の実線で示された状態）に切り換えられ、第１利用側流量調節弁４２ａが閉止された状態になる。ここでは、第２利用側コントローラ１０８ａ、１０８ｂのうちの１つによって、温調モードとしての熱源側切換機構２３の切換状態を熱源側放熱運転状態に切り換えた上で、第２利用側コントローラ１０８ａ及び／又は第２利用側コントローラ１０８ｂの運転指令によって、第２利用ユニット１０ａ及び／又は第２利用ユニット１０ｂの運転（冷房運転）が行われる。尚、冷房運転については、第２実施形態のヒートポンプシステム２００における冷房運転と同様であるため、ここでは説明を省略する。 -Cooling operation-
When only the cooling operation of the second usage unit 10a and / or the second usage unit 10b is performed, in the heat source side refrigerant circuit 20, the heat source side switching mechanism 23 is in the heat source side heat dissipation operation state (the heat source side switching mechanism in FIG. 6). 23, the first use side flow rate adjustment valve 42a is closed. Here, after switching the switching state of the heat source side switching mechanism 23 as the temperature control mode to the heat source side heat radiation operation state by one of the second usage side controllers 108a and 108b, the second usage side controller 108a and The operation (cooling operation) of the second usage unit 10a and / or the second usage unit 10b is performed according to the operation command of the second usage side controller 108b. Since the cooling operation is the same as the cooling operation in the heat pump system 200 of the second embodiment, the description thereof is omitted here.
　－暖房運転－
　第２利用ユニット１０ａ及び／又は第２利用ユニット１０ｂの暖房運転のみを行う場合には、熱源側冷媒回路２０においては、熱源側切換機構２３が熱源側放熱運転状態（図６の熱源側切換機構２３の破線で示された状態）に切り換えられ、吸入戻し膨張弁２６ａ及び第１利用側流量調節弁４２ａが閉止された状態になる。ここでは、第２利用側コントローラ１０８ａ、１０８ｂのうちの１つによって、温調モードとしての熱源側切換機構２３の切換状態を熱源側蒸発運転状態に切り換えた上で、第２利用側コントローラ１０８ａ及び／又は第２利用側コントローラ１０８ｂの運転指令によって、第２利用ユニット１０ａ及び／又は第２利用ユニット１０ｂの運転（暖房運転）が行われる。尚、暖房運転については、第２実施形態のヒートポンプシステム２００における暖房運転と同様であるため、ここでは説明を省略する。 -Heating operation-
When only the heating operation of the second usage unit 10a and / or the second usage unit 10b is performed, in the heat source side refrigerant circuit 20, the heat source side switching mechanism 23 is in the heat source side heat radiation operation state (the heat source side switching mechanism in FIG. 6). 23, the suction return expansion valve 26a and the first usage-side flow rate adjustment valve 42a are closed. Here, after switching the switching state of the heat source side switching mechanism 23 as the temperature control mode to the heat source side evaporation operation state by one of the second usage side controllers 108a and 108b, the second usage side controller 108a and The operation (heating operation) of the second usage unit 10a and / or the second usage unit 10b is performed according to the operation command of the second usage side controller 108b. Since the heating operation is the same as the heating operation in the heat pump system 200 of the second embodiment, the description thereof is omitted here.
　－給湯暖房運転－
　第１利用ユニット４ａの給湯運転を行うとともに第２利用ユニット１０ａ及び／又は第２利用ユニット１０ｂの暖房運転を行う場合には、熱源側冷媒回路２０においては、熱源側切換機構２３が熱源側蒸発運転状態（図６の熱源側切換機構２３の破線で示された状態）に切り換えられ、吸入戻し膨張弁２６ａが閉止された状態になる。また、水媒体回路８０ａにおいては、水媒体切換機構１６１ａが貯湯ユニット８ａ及び／又は温水暖房ユニット９ａに水媒体を供給する状態に切り換えられる。ここでは、第２利用側コントローラ１０８ａ、１０８ｂのうちの１つによって、温調モードとしての熱源側切換機構２３の切換状態を熱源側蒸発運転状態に切り換えた上で、第１利用側コントローラ７７ａの運転指令によって、第１利用ユニット４ａ（及び、貯湯ユニット８ａ及び／又は温水暖房ユニット９ａ）の運転（給湯運転）と、第２利用側コントローラ１０８ａ及び／又は第２利用側コントローラ１０８ｂの運転指令によって、第２利用ユニット１０ａ及び／又は第２利用ユニット１０ｂの運転（暖房運転）が行われる。 -Hot water heater operation-
When the hot water supply operation of the first usage unit 4a and the heating operation of the second usage unit 10a and / or the second usage unit 10b are performed, in the heat source side refrigerant circuit 20, the heat source side switching mechanism 23 is heat source side evaporation. The operation state is switched to the operation state (the state indicated by the broken line of the heat source side switching mechanism 23 in FIG. 6), and the suction return expansion valve 26a is closed. In the aqueous medium circuit 80a, the aqueous medium switching mechanism 161a is switched to a state in which the aqueous medium is supplied to the hot water storage unit 8a and / or the hot water heating unit 9a. Here, the switching state of the heat source side switching mechanism 23 as the temperature control mode is switched to the heat source side evaporation operation state by one of the second usage side controllers 108a and 108b, and then the first usage side controller 77a. According to the operation command, the operation (hot water supply operation) of the first usage unit 4a (and the hot water storage unit 8a and / or the hot water heating unit 9a) and the operation command of the second usage side controller 108a and / or the second usage side controller 108b The operation (heating operation) of the second usage unit 10a and / or the second usage unit 10b is performed.
　このような状態の熱源側冷媒回路２０において、冷凍サイクルにおける低圧の熱源側冷媒は、熱源側吸入管２１ｃを通じて、熱源側圧縮機２１に吸入され、冷凍サイクルにおける高圧まで圧縮された後に、熱源側吐出管２１ｂに吐出される。熱源側吐出管２１ｂに吐出された高圧の熱源側冷媒は、油分離器２２ａにおいて冷凍機油が分離される。油分離器２２ａにおいて熱源側冷媒から分離された冷凍機油は、油戻し管２２ｂを通じて、熱源側吸入管２１ｃに戻される。冷凍機油が分離された高圧の熱源側冷媒は、その一部が、熱源側吐出分岐管２１ｄ及び吐出側閉鎖弁３１を通じて、熱源ユニット２から吐出冷媒連絡管１２に送られ、その残りが、熱源側切換機構２３、第２熱源側ガス冷媒管２３ｂ及びガス側閉鎖弁３０を通じて、熱源ユニット２からガス冷媒連絡管１４に送られる。
　ガス冷媒連絡管１４に送られた高圧の熱源側冷媒は、第２利用ユニット１０ａ、１０ｂ（ここでは、第２利用ユニット１０ａ、１０ｂの両方を暖房運転するものとして説明する）に送られる。第２利用ユニット１０ａ、１０ｂに送られた高圧の熱源側冷媒は、第２利用側ガス冷媒管１０４ａ、１０４ｂを通じて、第２利用側熱交換器１０１ａ、１０１ｂに送られる。第２利用側熱交換器１０１ａ、１０１ｂに送られた高圧の熱源側冷媒は、第２利用側熱交換器１０１ａ、１０１ｂにおいて、利用側ファン１０５ａ、１０５ｂによって供給される空気媒体と熱交換を行って放熱し、これにより、室内の暖房を行う。第２利用側熱交換器１０１ａ、１０１ｂにおいて放熱した高圧の熱源側冷媒は、第２利用側流量調節弁１０２ａ、１０２ｂ及び第２利用側液冷媒管１０３ａ、１０３ｂを通じて、第２利用ユニット１０ａ、１０ｂから液冷媒連絡管１３に送られる。 In the heat source side refrigerant circuit 20 in such a state, the low pressure heat source side refrigerant in the refrigeration cycle is sucked into the heat source side compressor 21 through the heat source side suction pipe 21c and compressed to a high pressure in the refrigeration cycle, and then the heat source side refrigerant circuit 20 is cooled. It is discharged to the discharge pipe 21b. The high pressure heat source side refrigerant discharged to the heat source side discharge pipe 21b is separated from the refrigerating machine oil in the oil separator 22a. The refrigerating machine oil separated from the heat source side refrigerant in the oil separator 22a is returned to the heat source side suction pipe 21c through the oil return pipe 22b. A part of the high-pressure heat source side refrigerant from which the refrigerating machine oil has been separated is sent from the heat source unit 2 to the discharge refrigerant communication pipe 12 through the heat source side discharge branch pipe 21d and the discharge side shut-off valve 31, and the rest is used as the heat source. It is sent from the heat source unit 2 to the gas refrigerant communication pipe 14 through the side switching mechanism 23, the second heat source side gas refrigerant pipe 23 b, and the gas side closing valve 30.
The high-pressure heat-source-side refrigerant sent to the gas refrigerant communication tube 14 is sent to the second usage units 10a and 10b (here, it is assumed that both the second usage units 10a and 10b are operated for heating). The high-pressure heat-source-side refrigerant sent to the second usage units 10a, 10b is sent to the second usage- side heat exchangers 101a, 101b through the second usage-side gas refrigerant tubes 104a, 104b. The high-pressure heat-source-side refrigerant sent to the second usage- side heat exchangers 101a and 101b exchanges heat with the air medium supplied by the usage- side fans 105a and 105b in the second usage- side heat exchangers 101a and 101b. To dissipate heat, thereby heating the room. The high-pressure heat-source-side refrigerant radiated in the second usage- side heat exchangers 101a and 101b passes through the second usage-side flow rate adjustment valves 102a and 102b and the second usage-side liquid refrigerant tubes 103a and 103b, and the second usage units 10a and 10b. To the liquid refrigerant communication tube 13.
　吐出冷媒連絡管１２に送られた高圧の熱源側冷媒は、第１利用ユニット４ａに送られる。第１利用ユニット４ａに送られた高圧の熱源側冷媒は、第１利用側吐出冷媒管４６ａ及び第１利用側吐出逆止弁４９ａを通じて、第１利用側熱交換器４１ａに送られる。第１利用側熱交換器４１ａに送られた高圧の熱源側冷媒は、第１利用側熱交換器４１ａにおいて、利用側冷媒回路４０ａを循環する冷凍サイクルにおける低圧の利用側冷媒と熱交換を行って放熱する。第１利用側熱交換器４１ａにおいて放熱した高圧の熱源側冷媒は、第１利用側流量調節弁４２ａ及び第１利用側液冷媒管４５ａを通じて、第１利用ユニット４ａから液冷媒連絡管１３に送られる。
　第２利用ユニット１０ａ、１０ｂ及び第１利用ユニット４ａから液冷媒連絡管１３に送られた熱源側冷媒は、液冷媒連絡管１３において合流して、熱源ユニット２に送られる。熱源ユニット２に送られた熱源側冷媒は、液側閉鎖弁２９を通じて、過冷却器２７に送られる。過冷却器２７に送られた熱源側冷媒は、吸入戻し管２６に熱源側冷媒が流れていないため、熱交換を行うことなく、熱源側膨張弁２５に送られる。熱源側膨張弁２５に送られた熱源側冷媒は、熱源側膨張弁２５において減圧されて、低圧の気液二相状態になり、熱源側液冷媒管２４ａを通じて、熱源側熱交換器２４に送られる。熱源側熱交換器２４に送られた低圧の冷媒は、熱源側熱交換器２４において、熱源側ファン３２によって供給される室外空気と熱交換を行って蒸発する。熱源側熱交換器２４において蒸発した低圧の熱源側冷媒は、第１熱源側ガス冷媒管２３ａ及び熱源側切換機構２３を通じて、熱源側アキュムレータ２８に送られる。熱源側アキュムレータ２８に送られた低圧の熱源側冷媒は、熱源側吸入管２１ｃを通じて、再び、熱源側圧縮機２１に吸入される。 The high-pressure heat source side refrigerant sent to the discharge refrigerant communication tube 12 is sent to the first usage unit 4a. The high-pressure heat-source-side refrigerant sent to the first usage unit 4a is sent to the first usage-side heat exchanger 41a through the first usage-side discharge refrigerant tube 46a and the first usage-side discharge check valve 49a. The high-pressure heat-source-side refrigerant sent to the first usage-side heat exchanger 41a exchanges heat with the low-pressure usage-side refrigerant in the refrigeration cycle circulating in the usage-side refrigerant circuit 40a in the first usage-side heat exchanger 41a. To dissipate heat. The high-pressure heat-source-side refrigerant radiated in the first usage-side heat exchanger 41a is sent from the first usage unit 4a to the liquid refrigerant communication tube 13 through the first usage-side flow rate adjustment valve 42a and the first usage-side liquid refrigerant tube 45a. It is done.
The heat source side refrigerant sent from the second usage units 10a and 10b and the first usage unit 4a to the liquid refrigerant communication tube 13 merges in the liquid refrigerant communication tube 13 and is sent to the heat source unit 2. The heat source side refrigerant sent to the heat source unit 2 is sent to the supercooler 27 through the liquid side closing valve 29. The heat source side refrigerant sent to the subcooler 27 is sent to the heat source side expansion valve 25 without performing heat exchange because the heat source side refrigerant does not flow through the suction return pipe 26. The heat source side refrigerant sent to the heat source side expansion valve 25 is depressurized by the heat source side expansion valve 25 to be in a low-pressure gas-liquid two-phase state, and sent to the heat source side heat exchanger 24 through the heat source side liquid refrigerant tube 24a. It is done. The low-pressure refrigerant sent to the heat source side heat exchanger 24 evaporates by exchanging heat with outdoor air supplied by the heat source side fan 32 in the heat source side heat exchanger 24. The low-pressure heat source side refrigerant evaporated in the heat source side heat exchanger 24 is sent to the heat source side accumulator 28 through the first heat source side gas refrigerant tube 23a and the heat source side switching mechanism 23. The low-pressure heat source side refrigerant sent to the heat source side accumulator 28 is again sucked into the heat source side compressor 21 through the heat source side suction pipe 21c.
　一方、利用側冷媒回路４０ａにおいては、第１利用側熱交換器４１ａにおける熱源側冷媒の放熱によって利用側冷媒回路４０ａを循環する冷凍サイクルにおける低圧の利用側冷媒が加熱されて蒸発する。第１利用側熱交換器４１ａにおいて蒸発した低圧の利用側冷媒は、第２カスケード側ガス冷媒管６９ａを通じて、利用側アキュムレータ６７ａに送られる。利用側アキュムレータ６７ａに送られた低圧の利用側冷媒は、カスケード側吸入管７１ａを通じて、利用側圧縮機６２ａに吸入され、冷凍サイクルにおける高圧まで圧縮された後に、カスケード側吐出管７０ａに吐出される。カスケード側吐出管７０ａに吐出された高圧の利用側冷媒は、第１カスケード側ガス冷媒管７２ａを通じて、冷媒－水熱交換器６５ａに送られる。冷媒－水熱交換器６５ａに送られた高圧の利用側冷媒は、冷媒－水熱交換器６５ａにおいて、循環ポンプ４３ａによって水媒体回路８０ａを循環する水媒体と熱交換を行って放熱する。冷媒－水熱交換器６５ａにおいて放熱した高圧の利用側冷媒は、冷媒－水熱交側流量調節弁６６ａにおいて減圧されて、低圧の気液二相状態になり、カスケード側液冷媒管６８ａを通じて、再び、第１利用側熱交換器４１ａに送られる。 On the other hand, in the usage-side refrigerant circuit 40a, the low-pressure usage-side refrigerant in the refrigeration cycle circulating in the usage-side refrigerant circuit 40a is heated and evaporated by the heat radiation of the heat source-side refrigerant in the first usage-side heat exchanger 41a. The low-pressure usage-side refrigerant evaporated in the first usage-side heat exchanger 41a is sent to the usage-side accumulator 67a through the second cascade-side gas refrigerant tube 69a. The low-pressure use-side refrigerant sent to the use-side accumulator 67a is sucked into the use-side compressor 62a through the cascade-side suction pipe 71a, compressed to a high pressure in the refrigeration cycle, and then discharged to the cascade-side discharge pipe 70a. . The high-pressure use-side refrigerant discharged to the cascade-side discharge pipe 70a is sent to the refrigerant-water heat exchanger 65a through the first cascade-side gas refrigerant pipe 72a. The high-pressure use-side refrigerant sent to the refrigerant-water heat exchanger 65a radiates heat by exchanging heat with the aqueous medium circulating in the aqueous medium circuit 80a by the circulation pump 43a in the refrigerant-water heat exchanger 65a. The high-pressure use-side refrigerant that has radiated heat in the refrigerant-water heat exchanger 65a is decompressed in the refrigerant-water heat exchange side flow rate control valve 66a to become a low-pressure gas-liquid two-phase state, and passes through the cascade-side liquid refrigerant pipe 68a. Again, it is sent to the 1st utilization side heat exchanger 41a.
　また、水媒体回路８０ａにおいては、冷媒－水熱交換器６５ａにおける利用側冷媒の放熱によって水媒体回路８０ａを循環する水媒体が加熱される。冷媒－水熱交換器６５ａにおいて加熱された水媒体は、第１利用側水出口管４８ａを通じて、循環ポンプ４３ａに吸入され、昇圧された後に、第１利用ユニット４ａから水媒体連絡管１６ａに送られる。貯湯ユニット８ａに送られた水媒体は、熱交換コイル８２ａにおいて貯湯タンク８１ａ内の水媒体と熱交換を行って放熱し、これにより、貯湯タンク８１ａ内の水媒体を加熱する。温水暖房ユニット９ａに送られた水媒体は、熱交換パネル９１ａにおいて放熱し、これにより、室内の壁際等を加熱したり室内の床を加熱する。
　このようにして、第１利用ユニット４ａの給湯運転を行うとともに第２利用ユニット１０ａ及び／又は第２利用ユニット１０ｂの暖房運転を行う給湯暖房運転における動作が行われる。 In the aqueous medium circuit 80a, the aqueous medium circulating in the aqueous medium circuit 80a is heated by the heat radiation of the use-side refrigerant in the refrigerant-water heat exchanger 65a. The aqueous medium heated in the refrigerant-water heat exchanger 65a is drawn into the circulation pump 43a through the first usage-side water outlet pipe 48a, and after being pressurized, is sent from the first usage unit 4a to the aqueous medium communication pipe 16a. It is done. The aqueous medium sent to the hot water storage unit 8a exchanges heat with the aqueous medium in the hot water storage tank 81a in the heat exchange coil 82a to radiate heat, thereby heating the aqueous medium in the hot water storage tank 81a. The aqueous medium sent to the hot water heating unit 9a dissipates heat in the heat exchange panel 91a, thereby heating the indoor wall or the like or heating the indoor floor.
In this way, the hot water supply operation of the first usage unit 4a and the heating operation of the second usage unit 10a and / or the second usage unit 10b are performed.
　－排熱給湯運転－
　第１利用ユニット４ａの給湯運転を行うとともに第２利用ユニット１０ａ及び／又は第２利用ユニット１０ｂの冷房運転を行う排熱給湯運転を行う場合には、熱源側冷媒回路２０においては、熱源側切換機構２３が熱源側放熱運転状態（図６の熱源側切換機構２３の実線で示された状態）に切り換えられた状態になる。また、水媒体回路８０ａにおいては、水媒体切換機構１６１ａが貯湯ユニット８ａに水媒体を供給する状態に切り換えられる。ここでは、第２利用側コントローラ１０８ａ、１０８ｂのうちの１つによって、温調モードとしての熱源側切換機構２３の切換状態を熱源側蒸発運転状態に切り換えた上で、第１利用側コントローラ７７ａの運転指令によって、第１利用ユニット４ａ（及び、貯湯ユニット８ａ及び／又は温水暖房ユニット９ａ）の運転（給湯運転）と、第２利用側コントローラ１０８ａ及び／又は第２利用側コントローラ１０８ｂの運転指令によって、第２利用ユニット１０ａ及び／又は第２利用ユニット１０ｂの運転（冷房運転）が行われる。 -Waste heat hot water operation-
When performing a hot water supply operation for performing the hot water supply operation of the first usage unit 4a and performing the cooling operation of the second usage unit 10a and / or the second usage unit 10b, the heat source side refrigerant circuit 20 switches the heat source side. The mechanism 23 is switched to the heat source side heat radiation operation state (the state indicated by the solid line of the heat source side switching mechanism 23 in FIG. 6). In the aqueous medium circuit 80a, the aqueous medium switching mechanism 161a is switched to a state of supplying the aqueous medium to the hot water storage unit 8a. Here, the switching state of the heat source side switching mechanism 23 as the temperature control mode is switched to the heat source side evaporation operation state by one of the second usage side controllers 108a and 108b, and then the first usage side controller 77a. According to the operation command, the operation (hot water supply operation) of the first usage unit 4a (and the hot water storage unit 8a and / or the hot water heating unit 9a) and the operation command of the second usage side controller 108a and / or the second usage side controller 108b The second usage unit 10a and / or the second usage unit 10b is operated (cooling operation).
　このような状態の熱源側冷媒回路２０において、冷凍サイクルにおける低圧の熱源側冷媒は、熱源側吸入管２１ｃを通じて、熱源側圧縮機２１に吸入され、冷凍サイクルにおける高圧まで圧縮された後に、熱源側吐出管２１ｂに吐出される。熱源側吐出管２１ｂに吐出された高圧の熱源側冷媒は、油分離器２２ａにおいて冷凍機油が分離される。油分離器２２ａにおいて熱源側冷媒から分離された冷凍機油は、油戻し管２２ｂを通じて、熱源側吸入管２１ｃに戻される。冷凍機油が分離された高圧の熱源側冷媒は、その一部が、熱源側吐出分岐管２１ｄ及び吐出側閉鎖弁３１を通じて、熱源ユニット２から吐出冷媒連絡管１２に送られ、その残りが、熱源側切換機構２３及び第１熱源側ガス冷媒管２３ａを通じて、熱源側熱交換器２４に送られる。熱源側熱交換器２４に送られた高圧の熱源側冷媒は、熱源側熱交換器２４において、熱源側ファン３２によって供給される室外空気と熱交換を行って放熱する。熱源側熱交換器において放熱した高圧の熱源側冷媒は、熱源側膨張弁２５を通じて、過冷却器２７に送られる。過冷却器２７に送られた熱源側冷媒は、熱源側液冷媒管２４ａから吸入戻し管２６に分岐された熱源側冷媒と熱交換を行って過冷却状態になるように冷却される。吸入戻し管２６を流れる熱源側冷媒は、熱源側吸入管２１ｃに戻される。過冷却器２７において冷却された熱源側冷媒は、熱源側液冷媒管２４ａ及び液側閉鎖弁２９を通じて、熱源ユニット２から液冷媒連絡管１３に送られる。 In the heat source side refrigerant circuit 20 in such a state, the low pressure heat source side refrigerant in the refrigeration cycle is sucked into the heat source side compressor 21 through the heat source side suction pipe 21c and compressed to a high pressure in the refrigeration cycle, and then the heat source side refrigerant circuit 20 is cooled. It is discharged to the discharge pipe 21b. The high pressure heat source side refrigerant discharged to the heat source side discharge pipe 21b is separated from the refrigerating machine oil in the oil separator 22a. The refrigerating machine oil separated from the heat source side refrigerant in the oil separator 22a is returned to the heat source side suction pipe 21c through the oil return pipe 22b. A part of the high-pressure heat source side refrigerant from which the refrigerating machine oil has been separated is sent from the heat source unit 2 to the discharge refrigerant communication pipe 12 through the heat source side discharge branch pipe 21d and the discharge side shut-off valve 31, and the rest is used as the heat source. It is sent to the heat source side heat exchanger 24 through the side switching mechanism 23 and the first heat source side gas refrigerant tube 23a. The high-pressure heat-source-side refrigerant sent to the heat-source-side heat exchanger 24 radiates heat by exchanging heat with outdoor air supplied by the heat-source-side fan 32 in the heat source-side heat exchanger 24. The high-pressure heat-source-side refrigerant that has radiated heat in the heat-source-side heat exchanger is sent to the supercooler 27 through the heat source-side expansion valve 25. The heat source side refrigerant sent to the subcooler 27 is cooled so as to be in a supercooled state by exchanging heat with the heat source side refrigerant branched from the heat source side liquid refrigerant tube 24a to the suction return tube 26. The heat source side refrigerant flowing through the suction return pipe 26 is returned to the heat source side suction pipe 21c. The heat source side refrigerant cooled in the subcooler 27 is sent from the heat source unit 2 to the liquid refrigerant communication tube 13 through the heat source side liquid refrigerant tube 24a and the liquid side shut-off valve 29.
　吐出冷媒連絡管１２に送られた高圧の熱源側冷媒は、第１利用ユニット４ａに送られる。第１利用ユニット４ａに送られた高圧の熱源側冷媒は、第１利用側吐出冷媒管４６ａ及び第１利用側吐出逆止弁４９ａを通じて、第１利用側熱交換器４１ａに送られる。第１利用側熱交換器４１ａに送られた高圧の熱源側冷媒は、第１利用側熱交換器４１ａにおいて、利用側冷媒回路４０ａを循環する冷凍サイクルにおける低圧の利用側冷媒と熱交換を行って放熱する。第１利用側熱交換器４１ａにおいて放熱した高圧の熱源側冷媒は、第１利用側流量調節弁４２ａ及び第１利用側液冷媒管４５ａを通じて、第１利用ユニット４ａから液冷媒連絡管１３に送られる。
　熱源ユニット２及び第１利用ユニット４ａから液冷媒連絡管１３に送られた熱源側冷媒は、液冷媒連絡管１３において合流して、第２利用ユニット１０ａ、１０ｂ（ここでは、第２利用ユニット１０ａ、１０ｂの両方を暖房運転するものとして説明する）に送られる。第２利用ユニット１０ａ、１０ｂに送られた熱源側冷媒は、第２利用側流量調節弁１０２ａ、１０２ｂに送られる。第２利用側流量調節弁１０２ａ、１０２ｂに送られた熱源側冷媒は、第２利用側流量調節弁１０２ａ、１０２ｂにおいて減圧されて、低圧の気液二相状態になり、第２利用側液冷媒管１０３ａ、１０３ｂを通じて、第２利用側熱交換器１０１ａ、１０１ｂに送られる。第２利用側熱交換器１０１ａ、１０１ｂに送られた低圧の熱源側冷媒は、第２利用側熱交換器１０１ａ、１０１ｂにおいて、利用側ファン１０５ａ、１０５ａによって供給される空気媒体と熱交換を行って蒸発し、これにより、室内の冷房を行う。第２利用側熱交換器１０１ａ、１０１ｂにおいて蒸発した低圧の熱源側冷媒は、第２利用側ガス冷媒管１０４ａ、１０４ｂを通じて、第２利用ユニット１０ａ、１０ｂからガス冷媒連絡管１４に送られる。 The high-pressure heat source side refrigerant sent to the discharge refrigerant communication tube 12 is sent to the first usage unit 4a. The high-pressure heat-source-side refrigerant sent to the first usage unit 4a is sent to the first usage-side heat exchanger 41a through the first usage-side discharge refrigerant tube 46a and the first usage-side discharge check valve 49a. The high-pressure heat-source-side refrigerant sent to the first usage-side heat exchanger 41a exchanges heat with the low-pressure usage-side refrigerant in the refrigeration cycle circulating in the usage-side refrigerant circuit 40a in the first usage-side heat exchanger 41a. To dissipate heat. The high-pressure heat-source-side refrigerant radiated in the first usage-side heat exchanger 41a is sent from the first usage unit 4a to the liquid refrigerant communication tube 13 through the first usage-side flow rate adjustment valve 42a and the first usage-side liquid refrigerant tube 45a. It is done.
The heat-source-side refrigerant sent from the heat source unit 2 and the first usage unit 4a to the liquid refrigerant communication tube 13 merges in the liquid refrigerant communication tube 13, and the second usage units 10a and 10b (here, the second usage unit 10a). 10b will be described as heating operation). The heat-source-side refrigerant sent to the second usage units 10a and 10b is sent to the second usage-side flow rate adjustment valves 102a and 102b. The heat-source-side refrigerant sent to the second usage-side flow rate adjustment valves 102a, 102b is depressurized by the second usage-side flow rate adjustment valves 102a, 102b to be in a low-pressure gas-liquid two-phase state, and the second usage-side liquid refrigerant. It is sent to the second usage side heat exchangers 101a and 101b through the tubes 103a and 103b. The low-pressure heat source side refrigerant sent to the second usage side heat exchangers 101a and 101b exchanges heat with the air medium supplied by the usage side fans 105a and 105a in the second usage side heat exchangers 101a and 101b. This evaporates and cools the room. The low-pressure heat-source-side refrigerant evaporated in the second usage- side heat exchangers 101a and 101b is sent from the second usage units 10a and 10b to the gas refrigerant communication tube 14 through the second usage-side gas refrigerant tubes 104a and 104b.
　ガス冷媒連絡管１４に送られた低圧の熱源側冷媒は、熱源ユニット２に送られる。熱源ユニット２に送られた低圧の熱源側冷媒は、ガス側閉鎖弁３０、第２熱源側ガス冷媒管２３ｂ及び熱源側切換機構２３を通じて、熱源側アキュムレータ２８に送られる。熱源側アキュムレータ２８に送られた低圧の熱源側冷媒は、熱源側吸入管２１ｃを通じて、再び、熱源側圧縮機２１に吸入される。
　一方、利用側冷媒回路４０ａにおいては、第１利用側熱交換器４１ａにおける熱源側冷媒の放熱によって利用側冷媒回路４０ａを循環する冷凍サイクルにおける低圧の利用側冷媒が加熱されて蒸発する。第１利用側熱交換器４１ａにおいて蒸発した低圧の利用側冷媒は、第２カスケード側ガス冷媒管６９ａを通じて、利用側アキュムレータ６７ａに送られる。利用側アキュムレータ６７ａに送られた低圧の利用側冷媒は、カスケード側吸入管７１ａを通じて、利用側圧縮機６２ａに吸入され、冷凍サイクルにおける高圧まで圧縮された後に、カスケード側吐出管７０ａに吐出される。カスケード側吐出管７０ａに吐出された高圧の利用側冷媒は、第１カスケード側ガス冷媒管７２ａを通じて、冷媒－水熱交換器６５ａに送られる。冷媒－水熱交換器６５ａに送られた高圧の利用側冷媒は、冷媒－水熱交換器６５ａにおいて、循環ポンプ４３ａによって水媒体回路８０ａを循環する水媒体と熱交換を行って放熱する。冷媒－水熱交換器６５ａにおいて放熱した高圧の利用側冷媒は、冷媒－水熱交側流量調節弁６６ａにおいて減圧されて、低圧の気液二相状態になり、カスケード側液冷媒管６８ａを通じて、再び、第１利用側熱交換器４１ａに送られる。 The low-pressure heat source side refrigerant sent to the gas refrigerant communication tube 14 is sent to the heat source unit 2. The low-pressure heat source side refrigerant sent to the heat source unit 2 is sent to the heat source side accumulator 28 through the gas side shut-off valve 30, the second heat source side gas refrigerant tube 23b, and the heat source side switching mechanism 23. The low-pressure heat source side refrigerant sent to the heat source side accumulator 28 is again sucked into the heat source side compressor 21 through the heat source side suction pipe 21c.
On the other hand, in the usage-side refrigerant circuit 40a, the low-pressure usage-side refrigerant in the refrigeration cycle circulating in the usage-side refrigerant circuit 40a is heated and evaporated by the heat radiation of the heat-source-side refrigerant in the first usage-side heat exchanger 41a. The low-pressure usage-side refrigerant evaporated in the first usage-side heat exchanger 41a is sent to the usage-side accumulator 67a through the second cascade-side gas refrigerant tube 69a. The low-pressure use-side refrigerant sent to the use-side accumulator 67a is sucked into the use-side compressor 62a through the cascade-side suction pipe 71a, compressed to a high pressure in the refrigeration cycle, and then discharged to the cascade-side discharge pipe 70a. . The high-pressure use-side refrigerant discharged to the cascade-side discharge pipe 70a is sent to the refrigerant-water heat exchanger 65a through the first cascade-side gas refrigerant pipe 72a. The high-pressure use-side refrigerant sent to the refrigerant-water heat exchanger 65a radiates heat by exchanging heat with the aqueous medium circulating in the aqueous medium circuit 80a by the circulation pump 43a in the refrigerant-water heat exchanger 65a. The high-pressure use-side refrigerant that has radiated heat in the refrigerant-water heat exchanger 65a is decompressed in the refrigerant-water heat exchange side flow rate control valve 66a to become a low-pressure gas-liquid two-phase state, and passes through the cascade-side liquid refrigerant pipe 68a. Again, it is sent to the first usage side heat exchanger 41a.
　また、水媒体回路８０ａにおいては、第１利用側熱交換器４１ａにおける熱源側冷媒の放熱によって水媒体回路８０ａを循環する水媒体が加熱される。第１利用側熱交換器４１ａにおいて加熱された水媒体は、第１利用側水出口管４８ａを通じて、循環ポンプ４３ａに吸入され、昇圧された後に、第１利用ユニット４ａから水媒体連絡管１６ａに送られる。水媒体連絡管１６ａに送られた水媒体は、水媒体側切換機構１６１ａを通じて、貯湯ユニット８ａ及び／又は温水暖房ユニット９ａに送られる。貯湯ユニット８ａに送られた水媒体は、熱交換コイル８２ａにおいて貯湯タンク８１ａ内の水媒体と熱交換を行って放熱し、これにより、貯湯タンク８１ａ内の水媒体を加熱する。
　このようにして、第１利用ユニット４ａの給湯運転を行うとともに第２利用ユニット１０ａ及び／又は第２利用ユニット１０ｂの冷房運転を行う排熱給湯運転における動作が行われる。 In the aqueous medium circuit 80a, the aqueous medium circulating in the aqueous medium circuit 80a is heated by the heat radiation of the heat source side refrigerant in the first usage-side heat exchanger 41a. The aqueous medium heated in the first usage-side heat exchanger 41a is drawn into the circulation pump 43a through the first usage-side water outlet pipe 48a, and after the pressure is increased, the first usage unit 4a supplies the aqueous medium communication pipe 16a. Sent. The aqueous medium sent to the aqueous medium communication pipe 16a is sent to the hot water storage unit 8a and / or the hot water heating unit 9a through the aqueous medium side switching mechanism 161a. The aqueous medium sent to the hot water storage unit 8a exchanges heat with the aqueous medium in the hot water storage tank 81a in the heat exchange coil 82a to radiate heat, thereby heating the aqueous medium in the hot water storage tank 81a.
In this way, the operation in the exhaust heat hot water supply operation in which the hot water supply operation of the first usage unit 4a is performed and the cooling operation of the second usage unit 10a and / or the second usage unit 10b is performed.
　このように、このヒートポンプシステム４００においても、第３実施形態のヒートポンプシステム３００と同様に、第２利用ユニット１０ａ、１０ｂに指令を行う第２利用側コントローラ１０８ａ、１０８ｂのうちの１つ（ここでは、第２利用側コントローラ１０８ａとする）が指令している温調モードとしての熱源側切換機構２３の切換状態とは異なる温調モードに切り換えて運転することが可能な温調モード切り換え制御を行うようにしている。尚、温調モード切り換え制御については、第３実施形態のヒートポンプシステム３００における温調モード切り換え制御と同様であるため（図５等参照）、ここでは説明を省略する。
　これにより、このヒートポンプシステム４００においても、第３実施形態のヒートポンプシステム３００と同様の作用効果を得ることができる。 Thus, in the heat pump system 400 as well, as in the heat pump system 300 of the third embodiment, one of the second usage- side controllers 108a and 108b that commands the second usage units 10a and 10b (here, Temperature control mode switching control capable of operating by switching to a temperature control mode different from the switching state of the heat source side switching mechanism 23 as the temperature control mode commanded by the second use side controller 108a). Like that. Since the temperature control mode switching control is the same as the temperature control mode switching control in the heat pump system 300 of the third embodiment (see FIG. 5 and the like), the description thereof is omitted here.
Thereby, also in this heat pump system 400, the effect similar to the heat pump system 300 of 3rd Embodiment can be acquired.
　（他の実施形態）
　以上、本発明の実施形態について図面に基づいて説明したが、具体的な構成は、これらの実施形態に限られるものではなく、発明の要旨を逸脱しない範囲で変更可能である。
　＜Ａ＞
　上述のヒートポンプシステム１、２００、３００、４００（図１、３、４、６参照）では、第２利用側コントローラ１０８ａ、１０８ｂの１つによって温調モードの切り換えが行われるようになっているが、基本的には、指令された温調モードとは異なる温調モードに切り換えて運転することを可能にすることができればよいため、第１利用側コントローラ７７ａによって温調モードの切り換えが行われるようにしてもよいし、また、例えば、図７に示されるように、第１利用側コントローラ７７ａ及び第２利用側コントローラ１０８ａ、１０８ｂとは別の集中コントローラ３７を設けて、この集中コントローラ３７によって温調モードの切り換えを行われるようにしてもよい。ここで、集中コントローラ３７は、第１利用ユニット４ａや第２利用ユニット１０ａ、１０ｂのような個別の利用ユニットの制御設定や運転指令を行うものではなく、温調モードの切り換えを含むヒートポンプシステム全体に共通の制御設定や運転指令を行うものである。 (Other embodiments)
As mentioned above, although embodiment of this invention was described based on drawing, a specific structure is not restricted to these embodiment, It can change in the range which does not deviate from the summary of invention.
<A>
In the heat pump systems 1, 200, 300, and 400 described above (see FIGS. 1, 3, 4, and 6), the temperature control mode is switched by one of the second usage- side controllers 108a and 108b. Basically, since it is only necessary to be able to switch to a temperature control mode different from the commanded temperature control mode, the temperature control mode is switched by the first use side controller 77a. Alternatively, for example, as shown in FIG. 7, a centralized controller 37 other than the first usage-side controller 77 a and the second usage- side controllers 108 a and 108 b is provided, and the centralized controller 37 provides the temperature. The adjustment mode may be switched. Here, the centralized controller 37 does not perform control settings or operation commands for individual usage units such as the first usage unit 4a and the second usage units 10a and 10b, but the entire heat pump system including switching of the temperature control mode. Common control settings and operation commands are performed.
　しかし、集中コントローラ３７に温調モードの切り換えを行わせるようにすると、例えば、温調モードが熱源側蒸発運転状態に切り換えられたままで放置されると、夏期等の冷房運転が必要な運転条件においては、第２利用ユニット１０ａ、１０ｂの冷房運転が行われる毎に、温調モードが熱源側放熱運転状態に切り換えられることになり、また、温調モードが熱源側放熱運転状態に切り換えられたままで放置されると、冬期等の暖房運転が必要な運転条件においては、第２利用ユニット１０ａ、１０ｂの暖房運転が行われる毎に、温調モードが熱源側蒸発運転状態に切り換えられることになり、温調モードの切り換えが頻繁に行われることになってしまう。また、第１利用側コントローラ７７ａに温調モードの切り換えを行わせるようにすると、温調モードが熱源側蒸発運転状態に切り換えられたままで放置されることがほとんどであるため、夏期等の冷房運転が必要な運転条件においては、第２利用ユニット１０ａ、１０ｂの冷房運転が行われる毎に、温調モードが熱源側放熱運転状態に切り換えられることになってしまい、温調モードの切り換えが頻繁に行われることになってしまう。このように、第１利用側コントローラ７７ａや集中コントローラ３７に温調モードの切り換えを行わせるようにすると、温調モードの切り換えが頻繁に行われるおそれがあり、好ましくない。 However, if the central controller 37 is made to switch the temperature control mode, for example, if the temperature control mode is left switched to the heat source side evaporation operation state, the operation is performed in an operating condition that requires a cooling operation such as summer. Each time the cooling operation of the second usage units 10a and 10b is performed, the temperature control mode is switched to the heat source side heat radiation operation state, and the temperature control mode is still switched to the heat source side heat radiation operation state. If left unattended, under the operating conditions that require heating operation, such as in winter, the temperature adjustment mode is switched to the heat source side evaporation operation state each time the second usage unit 10a, 10b is heated. The temperature control mode is frequently switched. Further, if the first use side controller 77a is switched to the temperature control mode, the temperature control mode is almost always left switched to the heat source side evaporation operation state. In the operating conditions that require this, every time the second usage units 10a and 10b are cooled, the temperature control mode is switched to the heat source side heat radiation operation state, and the temperature control mode is frequently switched. Will be done. As described above, if the first use side controller 77a or the centralized controller 37 switches the temperature control mode, the temperature control mode may be frequently switched, which is not preferable.
　これに対して、温調モードの切り換えを第２利用側コントローラ１０８ａ、１０８ｂによって行うようにすると、夏期等の冷房運転が必要な運転条件においては、温調モードが熱源側放熱運転状態に切り換えられた状態が維持され、また、冬期等の暖房運転が必要な運転条件においては、温調モードが熱源側蒸発運転状態に切り換えられた状態が維持されるようになり、温調モードの切り換えが頻繁に行われることを防ぐことができる。
　このため、指令された温調モードとは異なる温調モードに切り換えて運転することを可能にするという観点だけでいえば、基本的には、第１利用側コントローラ７７ａ、第２利用側コントローラ１０８ａ、１０８ｂ、又は、集中コントローラ３７のいずれに温調モードの切り換えを行わせるようにしてもよいが、温調モードの切り換えの頻繁さという観点を考慮すると、上述のヒートポンプシステム１、２００、３００、４００（図１、３、４、６参照）のように、温調モードの切り換えを第２利用側コントローラ１０８ａ、１０８ｂによって行われせることが好ましい。 On the other hand, when the temperature control mode is switched by the second usage side controllers 108a and 108b, the temperature control mode is switched to the heat source side heat radiation operation state in an operation condition that requires cooling operation such as summer. In the operating conditions that require heating operation, such as in winter, the temperature control mode is switched to the heat source side evaporation operation state, and the temperature control mode is frequently switched. Can be prevented.
Therefore, from the viewpoint of enabling operation by switching to a temperature control mode different from the commanded temperature control mode, basically, the first use side controller 77a and the second use side controller 108a are used. 108b or the centralized controller 37, the temperature control mode may be switched. However, in view of the frequent switching of the temperature control mode, the above-described heat pump systems 1, 200, 300, As in 400 (see FIGS. 1, 3, 4, and 6), the temperature control mode is preferably switched by the second usage- side controllers 108a and 108b.
　＜Ｂ＞
　上述のヒートポンプシステム１、２００、３００、４００（図１、３、４、６参照）では、熱源ユニット２に１つの第１利用ユニット４ａと２つの第２利用ユニット１０ａ、１０ｂとが冷媒連絡管１３、１４等を介して接続されているが、これに限定されず、第１利用ユニットが複数であってもよいし、また、第２利用ユニットが１つや３つ以上であってもよい。
　＜Ｃ＞
　第２、第４実施形態にかかるヒートポンプシステム２００、４００においては、利用側冷媒としてＨＦＣ－１３４ａが使用されているが、これに限定されず、例えば、ＨＦＯ－１２３４ｙｆ（２、３、３、３－テトラフルオロ－１－プロペン）等、飽和ガス温度６５℃に相当する圧力がゲージ圧で高くとも２．８ＭＰａ以下、好ましくは、２．０ＭＰａ以下の冷媒であればよい。 <B>
In the above-described heat pump systems 1, 200, 300, and 400 (see FIGS. 1, 3, 4, and 6), one first usage unit 4a and two second usage units 10a and 10b in the heat source unit 2 are refrigerant communication tubes. However, the present invention is not limited to this, and there may be a plurality of first usage units, and there may be one or three or more second usage units.
<C>
In the heat pump systems 200 and 400 according to the second and fourth embodiments, the HFC-134a is used as the use-side refrigerant, but is not limited to this. (-Tetrafluoro-1-propene) or the like, a refrigerant whose pressure corresponding to a saturated gas temperature of 65 ° C. is at most 2.8 MPa or less, preferably 2.0 MPa or less.
　本発明を利用すれば、水媒体を加熱する給湯運転を行う利用ユニットと空気媒体の冷却や加熱を行う利用ユニットとが両者に共通の熱源ユニットに接続されたヒートポンプシステムにおいて、所望の運転に適した温調モードの切り換えが行われるようにすることができる。 The present invention is suitable for a desired operation in a heat pump system in which a use unit for performing a hot water supply operation for heating an aqueous medium and a use unit for cooling or heating an air medium are connected to a common heat source unit. The temperature control mode can be switched.
　１、２００、３００、４００　ヒートポンプシステム
　２　熱源ユニット
　４ａ　第１利用ユニット
　１０ａ、１０ｂ　第２利用ユニット
　２１　熱源側圧縮機
　２３　熱源側切換機構
　２４　熱源側熱交換器
　３７　集中コントローラ
　４１ａ　第１利用側熱交換器
　７７ａ　第１利用側コントローラ
　１０１ａ、１０１ｂ　第２利用側熱交換器
　１０５ａ、１０５ｂ　利用側ファン
　１０８ａ、１０８ｂ　第２利用側コントローラ DESCRIPTION OF SYMBOLS 1,200,300,400 Heat pump system 2 Heat source unit 4a 1st utilization unit 10a, 10b 2nd utilization unit 21 Heat source side compressor 23 Heat source side switching mechanism 24 Heat source side heat exchanger 37 Centralized controller 41a 1st utilization side heat exchange 77a 1st use side controller 101a, 101b 2nd use side heat exchanger 105a, 105b Use side fan 108a, 108b 2nd use side controller
特開２０００－４６４１７号公報JP 2000-46417 A

Claims (8)

  1. 　冷媒を圧縮する圧縮機（２１）と、熱源側熱交換器（２４）と、前記熱源側熱交換器を冷媒の放熱器として機能させる放熱運転状態と前記熱源側熱交換器を冷媒の蒸発器として機能させる蒸発運転状態とを切り換えることが可能な熱源側切換機構（２３）とを有する熱源ユニット（２）と、
    　前記熱源ユニットに接続されており、前記熱源側切換機構が前記蒸発運転状態において冷媒の放熱器として機能する第１利用側熱交換器（４１ａ）を有しており、前記第１利用側熱交換器における冷媒の放熱によって水媒体を加熱する給湯運転を行うことが可能な第１利用ユニット（４ａ）と、
    　前記熱源ユニットに接続されており、前記熱源側切換機構が前記放熱運転状態において冷媒の蒸発器として機能し、前記熱源側切換機構が前記蒸発運転状態において冷媒の放熱器として機能する第２利用側熱交換器（１０１ａ、１０１ｂ）を有しており、前記第２利用側熱交換器における冷媒の蒸発によって空気媒体を冷却する冷房運転を行い、前記第２利用側熱交換器における冷媒の放熱によって空気媒体を加熱する暖房運転を行うことが可能な第２利用ユニット（１０ａ、１０ｂ）とを備え、
    　前記第１利用ユニット及び前記第２利用ユニットは、個別に前記給湯運転、前記冷房運転又は前記暖房運転を選択して運転できないものであり、
    　前記第１利用ユニットに指令を行う第１利用側コントローラ（７７ａ）、前記第２利用ユニットに指令を行う第２利用側コントローラ（１０８ａ、１０８ｂ）、又は、前記第１利用側コントローラ及び前記第２利用側コントローラとは別の集中コントローラ（３７）が指令している温調モードとしての前記熱源側切換機構の切換状態とは異なる温調モードに切り換えて運転することが可能である、
    ヒートポンプユニット（１、２００、３００、４００）。     A compressor (21) for compressing the refrigerant, a heat source side heat exchanger (24), a heat radiation operation state in which the heat source side heat exchanger functions as a refrigerant radiator, and the heat source side heat exchanger as a refrigerant evaporator A heat source unit (2) having a heat source side switching mechanism (23) capable of switching between evaporation operation states to function as:
    Connected to the heat source unit, the heat source side switching mechanism has a first usage side heat exchanger (41a) that functions as a refrigerant radiator in the evaporation operation state, and the first usage side heat exchange. A first usage unit (4a) capable of performing a hot water supply operation for heating the aqueous medium by the heat radiation of the refrigerant in the cooler;
    A second usage side connected to the heat source unit, wherein the heat source side switching mechanism functions as a refrigerant evaporator in the heat radiation operation state, and the heat source side switching mechanism functions as a refrigerant heat radiator in the evaporation operation state. A heat exchanger (101a, 101b), performing a cooling operation for cooling the air medium by evaporation of the refrigerant in the second usage side heat exchanger, and by radiating heat of the refrigerant in the second usage side heat exchanger; A second usage unit (10a, 10b) capable of performing a heating operation for heating an air medium,
    The first usage unit and the second usage unit cannot be operated by individually selecting the hot water supply operation, the cooling operation or the heating operation,
    The first usage-side controller (77a) for instructing the first usage unit, the second usage-side controller (108a, 108b) for instructing the second usage unit, or the first usage-side controller and the second It is possible to operate by switching to a temperature control mode different from the switching state of the heat source side switching mechanism as the temperature control mode commanded by the centralized controller (37) different from the use side controller.
    Heat pump unit (1, 200, 300, 400).
  2. 　前記温調モードが前記放熱運転状態になっている際において、前記第１利用側コントローラ（７７ａ）から前記第１利用ユニット（４ａ）に給湯運転が指令された場合には、前記温調モードを前記蒸発運転状態に切り換えて、前記第１利用ユニットの給湯運転を行う運転である優先給湯運転を行う、請求項１に記載のヒートポンプシステム（１、２００、３００、４００）。 When the temperature adjustment mode is in the heat dissipation operation state, when the hot water supply operation is commanded from the first usage controller (77a) to the first usage unit (4a), the temperature adjustment mode is changed. The heat pump system (1, 200, 300, 400) according to claim 1, wherein a priority hot water supply operation, which is an operation of performing a hot water supply operation of the first usage unit, is performed by switching to the evaporation operation state.
  3. 　前記優先給湯運転中は、前記第２利用ユニット（１０ａ、１０ｂ）の冷房運転を禁止する、請求項２に記載のヒートポンプシステム（１、２００、３００、４００）。 The heat pump system (1, 200, 300, 400) according to claim 2, wherein the cooling operation of the second usage unit (10a, 10b) is prohibited during the priority hot water supply operation.
  4. 　前記第２利用ユニット（１０ａ、１０ｂ）は、前記第２利用側熱交換器（１０１ａ、１０１ｂ）に空気媒体を供給する利用側ファン（１０５ａ、１０５ｂ）をさらに有しており、
    　前記第２利用側コントローラ（１０８ａ、１０８ｂ）から冷房運転が指令されている前記第２利用ユニットについては、前記優先給湯運転中は、冷房運転を停止した状態で前記利用側ファンを運転する、
    請求項３に記載のヒートポンプシステム（１、２００、３００、４００）。     The second usage unit (10a, 10b) further includes usage-side fans (105a, 105b) for supplying an air medium to the second usage-side heat exchanger (101a, 101b),
    For the second usage unit for which the cooling operation is commanded from the second usage side controller (108a, 108b), during the priority hot water supply operation, the usage side fan is operated with the cooling operation stopped.
    The heat pump system (1, 200, 300, 400) according to claim 3.
  5. 　前記第２利用側コントローラ（１０８ａ、１０８ｂ）は、前記優先給湯運転における前記第２利用ユニット（１０ａ、１０ｂ）の冷房運転の停止中においても、冷房運転中である旨の表示を維持する、請求項４に記載のヒートポンプシステム（１、２００、３００、４００）。 The second usage-side controller (108a, 108b) maintains an indication that the cooling operation is in progress even when the cooling operation of the second usage unit (10a, 10b) is stopped in the priority hot water supply operation. Item 5. The heat pump system (1, 200, 300, 400) according to item 4.
  6. 　前記温調モードの切り換えは、前記指令された温調モード及び外気温度の少なくとも１つに基づいて行われる、請求項１～５のいずれかに記載のヒートポンプシステム（１、２００、３００、４００）。 The heat pump system (1, 200, 300, 400) according to any one of claims 1 to 5, wherein the switching of the temperature control mode is performed based on at least one of the commanded temperature control mode and an outside air temperature. .
  7. 　前記第１利用ユニット（４ａ）は、前記熱源側切換機構（２３）が前記放熱運転状態において、前記第２利用側熱交換器（１０１ａ、１０１ｂ）を冷媒の蒸発器として機能させるとともに、前記第１利用側熱交換器（４１ａ）を冷媒の放熱器として機能させることが可能となるように、前記熱源ユニット（２）に接続されている、請求項１～６のいずれかに記載のヒートポンプシステム（１、２００、３００、４００）。 The first usage unit (4a) causes the second usage-side heat exchanger (101a, 101b) to function as a refrigerant evaporator when the heat source side switching mechanism (23) is in the heat dissipation operation state, and The heat pump system according to any one of claims 1 to 6, connected to the heat source unit (2) so that the one use side heat exchanger (41a) can function as a refrigerant radiator. (1, 200, 300, 400).
  8. 　前記温調モードの切り換えは、前記第２利用側コントローラ（１０８ａ、１０８ｂ）によって行われる、請求項１～７のいずれかに記載のヒートポンプシステム（１、２００、３００、４００）。 The heat pump system (1, 200, 300, 400) according to any one of claims 1 to 7, wherein the switching of the temperature control mode is performed by the second usage side controller (108a, 108b).
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EP2402685B1 (en) 2018-08-22
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CN102326038B (en) 2013-11-06
KR20110129419A (en) 2011-12-01
JP2010196953A (en) 2010-09-09
AU2010219253B2 (en) 2013-05-16
KR101372594B1 (en) 2014-03-10
AU2010219253A1 (en) 2011-10-13
US20110302949A1 (en) 2011-12-15
US8650897B2 (en) 2014-02-18
EP2402685A1 (en) 2012-01-04

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